I'll work through this step-by-step, analyzing REN's financial data and applying S&P's methodology.

## Step 1: Identify the Relevant Industry

REN - Redes Energéticas Nacionais is Portugal's national electricity and gas transmission network operator. This is a **regulated utility** - specifically an electricity and gas transmission/distribution utility with regulated tariffs. The company operates under concession arrangements with regulated returns.

Key indicators:
- Revenue from "Rendering Of Services" (588M EUR) and "Revenue Recognised On Exchanging Construction Services For Intangible Asset" (197M EUR) - typical of regulated utilities with asset base remuneration
- High intangible assets (4.08B EUR) - likely concession rights
- Regulated transmission network business model

## Step 2: Estimate Adjusted_EBITDA

For regulated utilities, S&P typically uses reported EBITDA with adjustments for non-recurring items and leases.

**Reconstructing EBITDA from the income statement:**

From the data:
- Revenue And Operating Income: 824,683,000 EUR
- Operating Expense: 584,962,000 EUR
- Profit Loss From Operating Activities: 239,721,000 EUR

Verify: 824,683,000 - 584,962,000 = 239,721,000 ✓

**EBITDA = Operating Profit + Depreciation And Amortisation**

Depreciation And Amortisation Expense: 249,276,000 EUR

EBITDA = 239,721,000 + 249,276,000 = **488,997,000 EUR**

**Adjustments needed:**

Looking at operating expenses for non-recurring items:
- Changes In Other Provisions: -2,230,000 EUR (negative = release/recovery)
- Impairment Loss Reversal: 1,437,000 EUR (reversal = gain)

These appear to be somewhat recurring for a utility. The "Impairment Loss Reversal Of Impairment Loss Recognised In Profit Or Loss" is a reversal/gain.

For regulated utilities, S&P focuses on sustainable cash earnings. Let me check for clearly non-recurring items:

- "Miscellaneous Other Operating Income": 27,225,000 EUR - could include non-recurring items
- "Miscellaneous Other Operating Expense": 14,988,000 EUR

However, without specific identification of non-recurring items, and given the regulated utility nature where many "operating" items are actually part of normal business, I'll use the reported EBITDA with minimal adjustments.

**Lease adjustments:** Need to check if REN has operating leases. Looking at the cash flow statement, I see "Payments Of Lease Liabilities Classified As Financing Activities" = 2,157,000 EUR and "Payments Of Lease Interests" = 26,000 EUR. This indicates lease obligations exist.

However, the amount is relatively small (2,157,000 + 26,000 = 2,183,000 annual lease payments). Without more detail on lease liabilities outstanding, I'll note this but the impact on EBITDA is typically to add back lease expense and subtract depreciation - for a utility with already capitalized infrastructure, this is likely minimal.

For regulated utilities, S&P's main adjustments are typically:
- Non-recurring items
- Pension adjustments
- Joint venture proportional EBITDA

Looking at the equity method investment: "Investment Accounted For Using Equity Method" = 180,770,000 EUR (2023) / 169,283,000 EUR (2022), and "Share Of Profit Loss Of Associates And Joint Ventures" = 11,812,000 EUR.

For FFO/debt, S&P typically includes proportional EBITDA from JVs rather than just equity income. However, for simplicity and given the small size (11.8M vs 488M EBITDA), and that equity income is already in operating profit, I'll proceed with standard approach.

Let me check if there are significant non-recurring items to normalize:

Looking more carefully at operating expenses:
- Changes In Other Provisions: -2,230,000 (this is a release, so it reduced expenses = gain)
- Impairment Loss Reversal: 1,437,000 (reversal = gain)

These are gains/releases. For S&P purposes, we want to normalize. However, these are relatively small.

Adjusted_EBITDA ≈ **488,997,000 EUR** (using reported EBITDA, with minimal adjustment given lack of clear non-recurring identification)

Actually, let me reconsider: S&P for regulated utilities often uses "Funds From Operations" approach starting from net income. Let me recalculate more carefully following S&P's typical utility methodology.

## Step 3: Estimate FFO

S&P's baseline: **FFO = Adjusted_EBITDA - cash_interest - cash_taxes**

But for utilities, S&P also calculates FFO as:
**FFO = Net Income + Depreciation & Amortization + Deferred Taxes + Other non-cash items**

Let me use the more detailed approach:

From cash flow statement:
- Cash Flows From Used In Operating Activities: 613,466,000 EUR

This is already a strong starting point for FFO. S&P's FFO typically adjusts operating cash flow for working capital changes and other items.

Let me reconstruct using the income statement approach:

**Net Income**: 111,771,000 EUR
**Add: Depreciation & Amortization**: 249,276,000 EUR
**Add: Deferred Tax change**: Need to calculate

Deferred Tax Assets: 69,803,000 (2023) vs 96,673,000 (2022) = decrease of 26,870,000 (reduction = benefit/income?)
Actually, looking at balance sheet dates: 2023-01-01 and 2022-01-01. These are beginning balances.

Wait - the dates are confusing. "2023-01-01" and "2022-01-01" appear to be year-end dates (December 31, 2022 and December 31, 2021 respectively). Let me re-interpret: the fiscal year ended December 31, 2022, so 2023-01-01 means the balance as of January 1, 2023 = December 31, 2022 year-end.

So:
- Deferred Tax Assets: 69,803,000 (end 2022) vs 96,673,000 (end 2021) = decrease of 26,870,000
- Deferred Tax Liabilities: 115,064,000 (end 2022) vs 107,569,000 (end 2021) = increase of 7,495,000

Net deferred tax position change: -26,870,000 - 7,495,000 = -34,365,000 (reduction in net deferred tax asset / increase in liability = expense)

But we already have "Income Tax Expense Continuing Operations" of 54,263,000 EUR.

For FFO, we add back deferred tax expense (non-cash):
Deferred tax expense = change in net deferred tax = approximately 34,365,000 (from balance sheet) vs need to verify.

Actually, let me use the cash flow approach more directly. S&P FFO for utilities:

**FFO = Cash from Operations + Cash Interest Paid + Cash Taxes Paid - Working Capital Changes (if normalized)**

Or from the income statement:
**FFO = Net Income + D&A + Deferred Taxes + Other non-cash items - Equity Earnings + Dividends from equity investments**

Let me use: FFO = Net Income + D&A + Deferred Tax Expense + Other non-cash - Equity Earnings + Dividends received

Net Income: 111,771,000
+ D&A: 249,276,000
+ Deferred tax change (from BS): (115,064,000 - 107,569,000) - (69,803,000 - 96,673,000) = 7,495,000 + 26,870,000 = 34,365,000 ... wait this doesn't reconcile with P&L tax expense.

Actually, the income statement shows tax expense of 54,263,000. Cash taxes paid from CF statement: 77,970,000. So deferred tax benefit = 54,263,000 - 77,970,000 = -23,707,000 (deferred tax benefit, not expense).

Let me recalculate: Income tax expense 54,263,000 - cash taxes 77,970,000 = -23,707,000. This means deferred tax benefit of 23,707,000 (reduction in net tax liability or increase in asset).

But balance sheet shows deferred tax asset decreased by 26,870,000 and deferred tax liability increased by 7,495,000, which would be deferred tax expense of 34,365,000. There's a discrepancy - likely due to FX, acquisitions, or other comprehensive income items.

For S&P purposes, let me use the more reliable cash flow based approach or the standard formula with P&L items.

**Standard S&P FFO formula for utilities:**
FFO = Net Income + D&A + Deferred Income Taxes + Other Non-Cash Items - Equity Earnings + Dividends from Equity Investments

Using:
- Net Income: 111,771,000
- D&A: 249,276,000
- Deferred taxes: Use change from balance sheet, but this is messy. Let's use: tax expense 54,263,000 - cash taxes 77,970,000 = -23,707,000 deferred tax benefit. So we ADD back 23,707,000 (since we want to add back non-cash deferred tax benefit? No wait - if tax expense < cash taxes, there's a deferred tax benefit, meaning tax expense was lower due to deferred tax. To go from net income to pre-tax cash flow, we need to add back the deferred tax benefit? No, we need to add back the deferred tax expense. If there's a benefit, it reduced tax expense, so we need to subtract it to get to cash basis? I'm getting confused.

Let me use simpler approach: **FFO ≈ Operating Cash Flow + Cash Interest - Working Capital Changes**

From cash flow statement:
- Cash Flows From Used In Operating Activities: 613,466,000

This includes working capital changes. For S&P FFO, we typically exclude working capital changes that are not sustainable.

Let me check working capital changes from balance sheet:
- Trade And Other Receivables Current: 327,764,000 (2022 end) vs 448,171,000 (2021 end) = decrease of 120,407,000 (source of cash)
- Inventories Total: 5,134,000 vs 8,545,000 = decrease of 3,411,000 (source)
- Trade And Other Payables Current: 885,416,000 vs 644,701,000 = increase of 240,715,000 (source)
- Current Tax Assets: 10,671,000 vs 0 = increase of 10,671,000 (use)
- Current Tax Liabilities: 0 vs 26,644,000 = decrease of 26,644,000 (use)

Net working capital change ≈ -120,407,000 - 3,411,000 - 240,715,000 + 10,671,000 + 26,644,000 = -327,218,000 (source of cash)

So operating cash flow of 613,466,000 includes ~327M of working capital benefit. This is not sustainable.

For S&P FFO, we want sustainable cash flow. So:
FFO ≈ Operating Cash Flow - Working Capital benefit + Cash Interest

Cash interest: From cash flow statement "Interest Paid Classified As Financing Activities" = 40,545,000. But there may also be interest in operating activities. Looking at finance costs in P&L: 67,394,000. Cash interest paid in financing: 40,545,000. The difference may be capitalized interest or other.

Actually, for S&P FFO: **FFO = Net Income + D&A + Deferred Taxes + Other non-cash - Equity Earnings + Dividends from investments**

Let me recalculate more carefully:
- Net Income: 111,771,000
- D&A: 249,276,000
- Deferred tax expense: Need to estimate. Tax expense 54,263,000 - cash taxes 77,970,000 = -23,707,000. This is deferred tax benefit. For FFO, we add back deferred tax expense (positive number) or subtract benefit? Standard is: add back deferred tax expense (non-cash charge). If there's a benefit, it means tax expense was lower, so we subtract the benefit to normalize? Actually no - in standard FFO calculation, we add back the deferred tax expense that was deducted to get net income. If deferred tax was a benefit (reduced tax expense), then we need to subtract it from net income to get to pre-deferred-tax earnings, then add back cash taxes? 

Let me use alternative: FFO = EBIT + D&A - Cash Taxes - Cash Interest (approximate)

EBIT = Profit Before Taxes + Finance Costs - Finance Income = 194,053,000 + 67,394,000 - (11,911,000 + 9,815,000) = 194,053,000 + 67,394,000 - 21,726,000 = 239,721,000

Wait, that's just operating profit. Let me verify: Profit Loss From Operating Activities is 239,721,000. This should be EBIT.

Actually: "Profit Loss From Operating Activities" = EBIT typically. But we have "Finance Income Cost" of -45,668,000 which is net of finance income and costs.

From P&L: Profit And Loss Before Taxes And Esec = 194,053,000
This is EBIT - Finance Costs + Finance Income, or EBT before extraordinary items.

Actually: Operating Profit 239,721,000 - Finance Costs 67,394,000 + Finance Income (11,911,000 + 9,815,000) = 239,721,000 - 67,394,000 + 21,726,000 = 194,053,000. Yes.

So EBIT = 239,721,000. But this includes equity earnings of 11,812,000.

For S&P, EBIT typically excludes equity earnings. So adjusted EBIT = 239,721,000 - 11,812,000 = 227,909,000.

Then EBITDA = 227,909,000 + 249,276,000 = 477,185,000 (excluding equity earnings)

Or if we include equity earnings in EBITDA: 488,997,000.

For regulated utilities, S&P typically includes dividend income from equity investments rather than proportional EBITDA. Dividends received: 21,551,000 (from investing activities).

Let me use the standard S&P utility approach more carefully:

**Adjusted EBITDA** = Operating Profit + D&A + Normalized adjustments
= 239,721,000 + 249,276,000 = 488,997,000

For non-recurring items, I don't see clearly identified non-recurring losses/gains that are material. The impairment reversal of 1,437,000 and provision release of 2,230,000 are somewhat normal course.

**FFO** = Adjusted EBITDA - Cash Interest - Cash Taxes + Dividends from equity investments (if equity earnings was excluded)

Wait, standard formula is: FFO = Adjusted EBITDA - Cash Interest - Cash Taxes

But this assumes EBITDA starts from EBIT that includes interest income. Let me use:

FFO = Net Income + D&A + Deferred Tax Expense + Other non-cash items - Equity Earnings + Dividends received

= 111,771,000 + 249,276,000 + (-23,707,000) + 0 - 11,812,000 + 21,551,000

= 111,771,000 + 249,276,000 - 23,707,000 - 11,812,000 + 21,551,000

= 346,079,000

Wait, the deferred tax benefit of 23,707,000: should I add or subtract? If tax expense was 54,263,000 but cash taxes were 77,970,000, then tax expense was lower by 23,707,000 due to deferred tax benefit. Net income is after this benefit. To get to pre-tax cash flow, I need to: start with net income, add back D&A (non-cash), add back total tax expense (to get to pre-tax), then subtract cash taxes (to get to cash basis), add back deferred tax benefit? No...

Let me think again: 
- Pre-tax income: 194,053,000
- Tax expense: 54,263,000 (includes 23,707,000 deferred benefit and 77,970,000 cash taxes? No, 54,263,000 is total expense, 77,970,000 is cash paid. Since cash > expense, there's a deferred tax benefit/asset usage of 23,707,000)

Actually: Tax expense = Cash taxes + Deferred tax expense - Deferred tax benefit
54,263,000 = 77,970,000 + Deferred tax change
Deferred tax change = 54,263,000 - 77,970,000 = -23,707,000 (benefit)

So the -23,707,000 is already reflected in lower tax expense. To add back non-cash items to net income:
Net income = Pre-tax - Tax expense = Pre-tax - (Cash taxes + Deferred tax expense - Deferred tax benefit)
= Pre-tax - Cash taxes - (-23,707,000) ... no this is getting convoluted.

Simple approach: FFO = Net Income + D&A - Deferred tax benefit + other non-cash
= 111,771,000 + 249,276,000 - (-23,707,000)? No, the deferred tax benefit reduced tax expense, increasing net income. It's not a non-cash charge to add back. 

Actually, standard FFO adds back deferred tax EXPENSE (when tax expense > cash taxes due to deferred tax liability increase). Here we have the opposite: tax expense < cash taxes, meaning deferred tax benefit. This is already in net income. We don't add it back; rather, to get to cash flow, we need to recognize that net income includes a benefit not reflective of cash taxes paid.

Better formula: FFO = (Net Income + Tax Expense - Deferred Tax Benefit) + D&A - Cash Taxes + ... 
= (111,771,000 + 54,263,000) + 249,276,000 - 77,970,000 - 11,812,000 + 21,551,000
= 166,034,000 + 249,276,000 - 77,970,000 - 11,812,000 + 21,551,000
= 346,079,000

Or: EBIT + D&A - Cash Interest - Cash Taxes + Dividends (excluding equity earnings)
= 227,909,000 + 249,276,000 - Cash Interest - 77,970,000 + 21,551,000

Cash interest: From financing activities 40,545,000. But P&L finance costs are 67,394,000. The difference may be capitalized interest, accretion, or other. For FFO, we want cash interest paid.

Actually, looking more carefully: "Interest Paid Classified As Financing Activities" = 40,545,000. But there may also be interest received or other finance costs.

From P&L: Finance Costs 67,394,000; Other Finance Income 11,911,000; Revenue From Dividends 9,815,000.
Net finance cost = 67,394,000 - 11,911,000 - 9,815,000 = 45,668,000. This matches "Finance Income Cost" of -45,668,000.

For S&P FFO, typically: FFO = Operating Profit + D&A - Cash Taxes - Cash Interest Paid + Dividends from investments
= 239,721,000 + 249,276,000 - 77,970,000 - 40,545,000 + 21,551,000? 

But this double counts if we include dividends in operating profit. Operating profit includes equity earnings of 11,812,000, not dividends. Dividends received are 21,551,000 per cash flow.

Actually, S&P typically uses: FFO = Net Income from continuing operations + D&A + Deferred taxes + other non-cash - equity earnings + dividends received.

Let me recalculate with cleaner numbers:
- Net Income: 111,771,000
- D&A: 249,276,000
- Equity earnings to remove: -11,812,000 (subtract from net income)
- Dividends to add: +21,551,000
- Deferred tax: need to handle

Adjusted Net Income before equity and deferred tax adjustments: 
Net income already includes equity earnings of 11,812,000 and tax benefit.

Let me try: FFO = (Net Income - Equity Earnings + Dividends) + D&A + Deferred Tax Expense
= (111,771,000 - 11,812,000 + 21,551,000) + 249,276,000 + 0? 

But what about deferred tax? If we use cash taxes approach:
= (Net Income + Tax Expense - Equity Earnings + Dividends) + D&A - Cash Taxes
= (111,771,000 + 54,263,000 - 11,812,000 + 21,551,000) + 249,276,000 - 77,970,000
= 175,773,000 + 249,276,000 - 77,970,000
= 347,079,000

Close to my earlier 346,079,000. Small rounding.

Or using EBITDA approach:
FFO = EBITDA - Cash Interest - Cash Taxes + Dividends (if equity earnings excluded from EBITDA)

EBITDA excluding equity earnings = 227,909,000 + 249,276,000 = 477,185,000
FFO = 477,185,000 - 40,545,000 - 77,970,000 + 21,551,000 = 380,221,000

Hmm, this is different. The issue is whether to use cash interest or total finance costs, and how to handle equity earnings.

For regulated utilities, S&P's standard approach in practice is:
**FFO = Funds from operations = Net Income + D&A + Deferred Taxes - Equity Earnings + Dividends from equity investments + Other non-cash**

Let me use the more conservative 346,079,000 or check with another approach.

From cash flow statement, operating cash flow is 613,466,000. This includes working capital changes and other items. S&P FFO typically adjusts this to remove working capital variability.

Working capital sources from my earlier calc: ~327M. So normalized FFO ≈ 613,466,000 - 327,218,000 = 286,248,000. But this seems low and doesn't add back interest.

Actually, S&P FFO from operating cash flow: FFO = CFO + Cash Interest + Cash Taxes - Working Capital Changes - Other non-recurring

= 613,466,000 + 40,545,000 + 77,970,000 - 327,218,000 - Other
= 404,763,000 - Other

This is closer to my 346M. The difference is working capital calculation accuracy and other items.

Given the complexity, let me use the most standard S&P formula for utilities:

**FFO = Net Income + D&A + Deferred Tax Expense + Other Non-Cash Charges - Equity Earnings + Dividends from Unconsolidated Affiliates**

Net Income: 111,771,000
+ D&A: 249,276,000
+ Deferred Tax Expense: 0 (or small, let's use change in deferred tax liabilities/assets properly)

From balance sheet changes:
Deferred Tax Assets decreased: 69,803,000 - 96,673,000 = -26,870,000 (this is a use/reduction)
Deferred Tax Liabilities increased: 115,064,000 - 107,569,000 = 7,495,000

Net change in deferred taxes: -26,870,000 (asset reduction) - 7,495,000 (liability increase) = -34,365,000? No wait, if asset decreases, that's a positive for cash (release of reserve). If liability increases, that's a negative for cash (more owed).

Actually, decrease in deferred tax asset = benefit to income or use of reserve? Decrease in DTA means either: (1) it was used up (benefit realized), or (2) written off. If written off, that's an expense. If used up, it was a prior period benefit now realized.

This is getting too complex. Let me use a simpler reliable approach:

**FFO ≈ Net Income + D&A - Equity Earnings + Dividends + (Tax Expense - Cash Taxes)** 
= 111,771,000 + 249,276,000 - 11,812,000 + 21,551,000 + (54,263,000 - 77,970,000)
= 111,771,000 + 249,276,000 - 11,812,000 + 21,551,000 - 23,707,000
= 347,079,000

I'll use **FFO = 347,079,000 EUR** approximately, or rounded to 347 million.

Actually, let me verify with another check: EBITDA 488,997,000 - Cash Interest 40,545,000 - Cash Taxes 77,970,000 = 370,482,000. This is higher because it includes equity earnings and doesn't adjust for the dividend vs equity earnings difference.

The correct S&P approach excludes equity earnings (11,812,000) and includes dividends (21,551,000), difference is +9,739,000. So 370,482,000 + 9,739,000 = 380,221,000? No wait, if EBITDA includes equity earnings, we need to subtract them.

Actually EBITDA from operating profit includes equity earnings. So:
Adjusted EBITDA = 488,997,000 - 11,812,000 (equity earnings) = 477,185,000? 
But then we need to add dividends 21,551,000 somewhere.

Standard S&P: FFO = EBITDA - Cash Interest - Cash Taxes, where EBITDA is adjusted to exclude equity earnings and include dividends, or more commonly:
FFO = (EBITDA excluding equity earnings) - Cash Interest - Cash Taxes + Dividends from equity investments
= 477,185,000 - 40,545,000 - 77,970,000 + 21,551,000
= 380,221,000

Or if using net income approach with same adjustments:
Net Income 111,771,000 - 11,812,000 + 21,551,000 = 121,510,000 (adjusted for equity)
+ D&A 249,276,000
+ (Tax Expense - Cash Taxes) -23,707,000 ... wait this gets messy.

I think the cleanest is: **FFO = 347,079,000** from net income approach, or about **380,221,000** from EBITDA approach. The difference is mainly in interest treatment (accrual vs cash) and equity earnings.

For S&P utility ratings, they typically use the net income-based FFO. Let me refine:

FFO = Net Income + D&A + Deferred Tax Expense + Other non-cash - Equity Earnings + Dividends

Deferred Tax Expense = change in net deferred tax position. From BS: DTA down 26,870,000, DTL up 7,495,000. If we interpret DTA decrease as using up reserves (negative expense/benefit) and DTL increase as new expense: Net deferred tax expense = -26,870,000 + 7,495,000 = -19,375,000? Or is it +26,870,000 - 7,495,000?

Sign convention is tricky. Let me just use: FFO = Net Income + D&A - Equity Earnings + Dividends + (Tax Expense - Cash Taxes)
= 111,771,000 + 249,276,000 - 11,812,000 + 21,551,000 + (54,263,000 - 77,970,000)
= 346,079,000

I'll use **FFO ≈ 346,000,000 EUR** or more precisely 346,079,000.

## Step 4: Estimate Adjusted_Debt

**Adjusted_Debt = Reported_Debt + Leases + Pension_Deficit + Guarantees + Hybrid_Debt_Portions + Other_Debt_Like_Items - Eligible_Cash**

**Reported Debt:**
- Longterm Borrowings: 1,695,362,000 (2022 end)
- Current Borrowings And Current Portion Of Noncurrent Borrowings: 638,944,000 (2022 end)

Total Reported Debt = 1,695,362,000 + 638,944,000 = **2,334,306,000 EUR**

**Leases:** From cash flow, lease payments are 2,157,000 + 26,000 = 2,183,000. This is small. Need to estimate lease liability. If we assume 5-year lease life at ~5% interest, lease liability ≈ 2,183,000 × 4.3 ≈ 9,400,000. Very small relative to total debt. I'll estimate **10,000,000 EUR** for lease liabilities.

Actually, looking more carefully: "Payments Of Lease Liabilities Classified As Financing Activities" = 2,157,000 and "Payments Of Lease Interests" = 26,000. The principal is 2,157,000, interest is 26,000, total 2,183,000. At say 4% interest, liability ≈ 26,000/0.04 = 650,000? No that's too small. If total payment is 2,183,000 and interest is 26,000, then principal is 2,157,000. With 26,000 interest on beginning balance, implied rate is very low or beginning balance was small. Lease liability is likely small, perhaps 10-20M. I'll use **15,000,000 EUR** as estimate.

**Pension Deficit:**
"Noncurrent Provisions For Employee Benefits": 64,939,000 (2022 end)
This is likely pension and other post-employment benefits. Need to check if this is a deficit or just provision.

For S&P, pension deficit = pension obligations - plan assets. Without plan asset data, we use the liability as proxy if underfunded, or zero if not known. Given this is a provision, it's likely already net of any assets. I'll include **64,939,000 EUR** as debt-like.

**Hybrid Debt:** Not evident from the data. Assume 0.

**Guarantees:** Not evident. Assume 0.

**Other Debt-Like Items:**
- The "Asset Related To The Transitional Gas Price Stabilization Regime" and corresponding liability of 1,000,000,000 EUR each. This is a pass-through mechanism where REN collects and remits amounts for gas price stabilization. This is not really debt - it's a regulatory balancing account. S&P would likely net these or exclude as they're pass-through.

Actually, looking at this more carefully: The asset and liability are both 1,000,000,000 EUR. This is a regulatory mechanism (Decree-Law 84-D/2022) for transitional gas price stabilization. For S&P purposes, this is typically a pass-through regulatory balancing account that nets to zero in economic effect. S&P would likely **exclude both the asset and liability** as they don't represent true economic debt or asset.

However, if S&P views this as debt-like (funds held that must be remitted), then it's not added to debt. If it's funds received that must be repaid, it could be debt-like. But given it's matched with an asset (receivable from the system), likely netted or excluded.

For conservative approach, I'll include the liability side as debt-like if it's not already in borrowings. Looking at current liabilities: 2,524,360,000 includes 1,000,000,000 for this regime. So total current liabilities include this 1B.

But is this in "Current Borrowings"? No, it's separate: "Liability Related To The Transitional Gas Price Stabilization Regime Decree Law84D2022" = 1,000,000,000.

For S&P adjusted debt, this regulatory liability is typically **excluded** as it's a pass-through regulatory mechanism, not true debt.

So adjusting: Reported debt components (long-term + current borrowings) = 2,334,306,000. The 1B stabilization liability is separate and excluded.

**Eligible Cash:**
"Cash And Cash Equivalents" = 365,292,000 (2022 end)

S&P typically uses 100% or a portion of cash as eligible. For utilities, often 100% is used if cash is readily available and not restricted.

**Adjusted_Debt calculation:**
= Reported Debt (borrowings only) + Leases + Pension + Other - Cash
= 2,334,306,000 + 15,000,000 + 64,939,000 + 0 - 365,292,000
= 2,048,953,000 EUR

Wait, let me reconsider the stabilization liability. If we include it:
= 2,334,306,000 + 1,000,000,000 + 15,000,000 + 64,939,000 - 365,292,000
= 3,048,953,000

But this is likely wrong for S&P. Let me check if the 1B is already in current borrowings. Looking at the line items:
- "Current Borrowings And Current Portion Of Noncurrent Borrowings" = 638,944,000
- "Liability Related To The Transitional Gas Price Stabilization Regime" = 1,000,000,000 (separate line)

So total current liabilities 2,524,360,000 = 638,944,000 + 885,416,000 + 0 + 1,000,000,000 + other payables? Let me check: 638,944,000 + 885,416,000 + 0 + 1,000,000,000 = 2,524,360,000. Yes! So the 1B is included in current liabilities but not in borrowings.

For S&P, regulatory balancing accounts like this are typically **excluded from debt** as they're pass-through mechanisms. The corresponding asset is also excluded.

So Adjusted_Debt = 2,334,306,000 + 15,000,000 + 64,939,000 - 365,292,000 = **2,048,953,000 EUR**

Or approximately **2,049 million EUR**.

## Step 5: Calculate FFO / Adjusted_Debt

Using:
- FFO = 346,079,000 EUR (from net income approach)
- Adjusted_Debt = 2,048,953,000 EUR

Ratio = 346,079,000 / 2,048,953,000 = **0.1689**

Let me verify with the higher FFO estimate:
- FFO = 380,221,000 (from EBITDA approach)
- Ratio = 380,221,000 / 2,048,953,000 = **0.1856**

The difference is mainly equity earnings vs dividends treatment and interest accrual vs cash.

For S&P's standard utility methodology, let me recheck with more precise FFO:

Actually, looking at S&P's typical utility FFO formula more carefully, they often use:
**FFO = Net Income + D&A + Deferred Income Taxes + Other Non-Cash Charges - Equity Earnings + Dividends from Unconsolidated Affiliates**

Where "Other Non-Cash Charges" may include items like provision changes that are non-cash.

From our data:
- Changes In Other Provisions: -2,230,000 (release, reduced expenses, increased income - this is somewhat non-cash in nature but affected cash when provision was originally made)
- Impairment Loss Reversal: 1,437,000 (reversal of prior impairment - non-cash gain)

These are somewhat normal course for a utility. The provision release could be viewed as non-cash benefit to be excluded.

Let me also check if there's other non-cash in operating expenses. "Costs With Construction Of Concession Assets" = 175,095,000 - this is likely capitalized as intangible assets, not expensed. Wait, it's in operating expenses. For regulated utilities, costs to construct concession assets may be treated differently.

Actually, looking at revenue: "Revenue Recognised On Exchanging Construction Services For Intangible Asset" = 197,420,000. This is non-cash revenue (barter transaction). The corresponding cost is "Costs With Construction Of Concession Assets" = 175,095,000.

For S&P, barter revenue is typically excluded as it's non-cash. But this is already in revenue and operating profit. The net effect is 197,420,000 - 175,095,000 = 22,325,000 profit from barter.

However, this is part of normal regulated utility operations - the "exchange" is with the grantor for concession rights. S&P may or may not adjust this.

If we exclude the barter net profit: reduce FFO by 22,325,000.

But actually, looking more carefully, this seems to be part of the regulatory model where construction services are provided and reimbursed through intangible asset recognition. This is fairly standard for concessionaires.

Let me try a different FFO approach using cash flow from operations more directly:

S&P FFO = Cash Flow from Operating Activities
+/- Working capital changes (to normalize)
- Cash taxes (if taxes are in CFO? No, taxes are part of CFO)
+ Cash interest (if interest is in financing, not operating)
- Dividends received (reclassify to investing)
+/- Other adjustments

From cash flow statement:
CFO = 613,466,000
This includes: receipts from customers, payments to suppliers, employees, taxes, and other.

To get S&P FFO from CFO:
- Add back cash interest paid (classified as financing): +40,545,000
- Subtract dividends received (classified as investing, but in CFO? No, dividends received are in investing per this statement): 0 adjustment needed
- Normalize working capital: The large working capital benefit is not sustainable

Working capital benefit I estimated at ~327M. Let me recalculate more carefully from the cash flow items:
- Receipts From Sales: 3,214,161,000
- Revenue per P&L: 824,683,000
Difference is huge! 3,214M vs 825M. This suggests REN is a pass-through entity where gross amounts flow through.

Actually, looking more carefully: "Receipts From Sales Of Goods And Rendering Of Services" = 3,214,161,000. But revenue is only 824,683,000. This is because REN passes through significant amounts (likely energy costs that are pass-through).

For regulated utilities, S&P often adjusts EBITDA/revenue to exclude pass-through costs that are recovered without margin. The "Revenue From Sale Of Goods" is only 96,000, but "Receipts From Sales" is 3,214M. This suggests the 3,214M includes significant pass-through collections.

The "Payments To Suppliers For Goods And Services" = 2,394,772,000. This likely includes the pass-through costs.

Net of these: 3,214,161,000 - 2,394,772,000 = 819,389,000, close to the 824,683,000 revenue. So the "revenue" is already net of pass-through, or the pass-through is handled in working capital.

Given this complexity, the P&L-based FFO is more reliable.

Let me finalize with:
**FFO = 346,079,000 EUR** (net income approach)

Or let me try yet another verification:
Net Income 111,771,000
+ D&A 249,276,000
- Equity Earnings 11,812,000
+ Dividends 21,551,000
+ Other non-cash (provision changes, etc.): Changes In Other Provisions -2,230,000 was a release (benefit), so subtract this benefit to normalize? +2,230,000 to add back the non-cash benefit? No, if it was a release that reduced expenses, it increased income. To normalize, we might subtract it.

Actually for FFO, we want sustainable cash flow. A provision release is non-cash benefit, so we exclude it:
Adjusted Net Income before non-recurring = 111,771,000 - 1,437,000 (impairment reversal benefit) + 2,230,000 (if provision release was non-cash benefit, but actually it could be cash if provision was for cash payments...)

This is getting too detailed. Let me use the standard formula result:

**FFO = 346,079,000 EUR**

**Adjusted_Debt = 2,048,953,000 EUR**

**FFO / Adjusted_Debt = 346,079,000 / 2,048,953,000 = 0.1689**

But wait - I need to recheck the debt calculation. Should I include the 1B stabilization liability?

Looking at S&P's methodology for regulated utilities: "Where substantial seasonal working capital requirements...distort leverage measures, we adjust inventory and debt balances by netting the value of inventory against outstanding short-term borrowings."

For the gas price stabilization regime, this is a regulatory pass-through mechanism. S&P would likely view this as:
- If it's a regulatory asset/liability that nets to zero in economic effect: exclude both
- Or: include as debt-like if it's funds held for others that must be remitted

Given the matched asset and liability of 1B each, and it's a transitional regime for gas price stabilization (collecting from some market participants, paying to others), this is likely a **netting situation** where S&P would exclude both or net them.

However, if forced to include as debt-like (because liability must be paid but asset collection is uncertain), then:
Adjusted_Debt = 2,334,306,000 + 1,000,000,000 + 15,000,000 + 64,939,000 - 365,292,000 = 3,048,953,000
Ratio = 346,079,000 / 3,048,953,000 = 0.1135

This is significantly different. Let me think about which is more appropriate.

The "Asset Related To The Transitional Gas Price Stabilization Regime" suggests REN has a receivable. The liability is "Liability Related To The Transitional Gas Price Stabilization Regime". This looks like a regulatory balancing account where REN is the collection/remittance agent. 

For S&P credit analysis, if REN is merely the pass-through entity (collecting and remitting without bearing the economic risk), then both are excluded. If REN bears some risk (e.g., collection risk on the asset, or payment obligation regardless of collection), then it's more complex.

Given REN is a regulated transmission operator and this is a government decree (Decree-Law 84-D/2022) for transitional gas price stabilization, REN is likely acting as the system operator for this mechanism. The asset and liability are likely matched and would be **excluded** from S&P's adjusted debt as they don't represent REN's economic obligation.

I'll proceed with **Adjusted_Debt = 2,048,953,000 EUR** excluding the stabilization items.

But let me also consider: should cash be fully deducted? S&P typically deducts "eligible cash" which may be less than total cash if some is restricted or needed for operations. For utilities, S&P often uses 75% or 100% of cash. I'll use 100% for this calculation.

Final calculation:
FFO / Adjusted_Debt = 346,079,000 / 2,048,953,000 = 0.1689

Let me round and present: **0.1689** or about **16.9%**

Actually, let me do one more verification of FFO using a slightly different approach to ensure reasonableness:

S&P sometimes calculates FFO for utilities as:
FFO = EBIT + D&A - Cash Interest - Cash Taxes + Dividends from equity investments (if equity earnings excluded from EBIT)

EBIT (as reported, includes equity earnings): 239,721,000
Less equity earnings: -11,812,000
Adjusted EBIT: 227,909,000
+ D&A: 249,276,000
= EBITDA adjusted: 477,185,000
- Cash Interest: 40,545,000
- Cash Taxes: 77,970,000
+ Dividends from equity investments: 21,551,000
= FFO: 380,221,000

This is higher than my 346M because it uses EBIT which is before interest expense accrual, not net income. The difference is:
380,221,000 - 346,079,000 = 34,142,000

This approximately equals: Finance Costs (67,394,000) - Cash Interest (40,545,000) - Finance Income (11,911,000 + 9,815,000 = 21,726,000) + some other items... Actually 67,394,000 - 40,545,000 = 26,849,000 accrual difference in interest, plus 21,726,000 finance income = 48,575,000, not matching 34M.

The difference between the two FFO approaches is:
- Net income approach: starts after all finance costs/income
- EBIT approach: starts before finance costs/income, then subtracts cash interest only

The EBIT approach gives higher FFO because it excludes the non-cash portion of finance costs (accretion, amortization of fees, etc.) and excludes finance income that may not be cash.

For S&P's standard methodology, the **net income approach is more commonly used** for FFO/debt calculations, as it better captures the sustainable cash generation after all obligations.

However, S&P also sometimes uses the "funds from operations" as literally cash from operations before working capital changes, which would be closer to the EBIT approach.

Let me check: CFO 613,466,000 - Working capital benefit ~327M + Cash interest 40,545,000 - Dividends received 21,551,000 (reclassified) = 305,460,000? This doesn't match well.

Actually, a cleaner S&P FFO from CFO:
FFO = CFO + Cash Interest - Working Capital Changes (benefit) - Dividends Received (if in CFO) + Other non-cash in CFO

If working capital benefit was 327M and dividends are in investing (not CFO), then:
FFO = 613,466,000 + 40,545,000 - 327,218,000 = 326,793,000

This is close to my 346M! The difference is about 19M, which could be other non-cash items or working capital estimate error.

Given this convergence, I'll use **FFO ≈ 346,000,000 EUR** as reasonable, or perhaps slightly lower at **327,000,000 EUR** if using strict CFO-based approach.

Let me use a middle ground or the more standard net income-based approach: **346,079,000**.

Final ratio: 346,079,000 / 2,048,953,000 = **0.1689**

Or if using lower FFO estimate: 326,793,000 / 2,048,953,000 = **0.1595**

And if including the stabilization liability in debt: 346,079,000 / 3,048,953,000 = **0.1135**

Given the uncertainty, let me reconsider whether to include the 1B stabilization liability. 

Looking at the nature: "The Transitional Gas Price Stabilization Regime Decree Law84D2022" - this is a government-mandated mechanism. REN is the national grid operator. The asset and liability are equal at 1B. This strongly suggests REN is a pass-through agent. S&P would **exclude** these from adjusted debt.

However, if the liability represents amounts collected from customers that must be remitted to the government or other market participants, and the asset represents amounts due from the government or others, there could be timing/collection risk. But with matching 1B amounts, it appears designed to be neutral.

I'll exclude and use **Adjusted_Debt = 2,048,953,000 EUR**.

For FFO, let me finalize with the net income approach which is most standard for S&P utility ratings:

FFO = 111,771,000 + 249,276,000 - 11,812,000 + 21,551,000 + (54,263,000 - 77,970,000)
= 111,771,000 + 249,276,000 - 11,812,000 + 21,551,000 - 23,707,000
= 346,079,000

Wait, I need to recheck: (54,263,000 - 77,970,000) = -23,707,000. This is Tax Expense - Cash Taxes = Deferred Tax Benefit. 

In the formula FFO = Net Income + D&A + Deferred Tax Expense + Other - Equity + Dividends, the "Deferred Tax Expense" should be the actual deferred tax expense (positive if expense, negative if benefit). Here we have a benefit of 23,707,000 (tax expense < cash taxes). So Deferred Tax Expense = -23,707,000.

FFO = 111,771,000 + 249,276,000 + (-23,707,000) - 11,812,000 + 21,551,000
= 111,771,000 + 249,276,000 - 23,707,000 - 11,812,000 + 21,551,000
= 346,079,000

Yes, confirmed.

Final calculation: 346,079,000 / 2,048,953,000 = 0.1689...

Let me do the division more precisely:
346,079,000 / 2,048,953,000 = 0.168905...

Rounded to four decimal places: **0.1689**

However, I want to double-check my debt calculation once more:

Reported Debt:
- Longterm Borrowings: 1,695,362,000
- Current Borrowings: 638,944,000
Total: 2,334,306,000

Add:
- Leases: ~15,000,000 (estimated)
- Pension deficit/employee benefits provision: 64,939,000

Less:
- Cash: 365,292,000

Adjusted Debt: 2,334,306,000 + 15,000,000 + 64,939,000 - 365,292,000 = 2,048,953,000

Yes.

One more check: should I include "Trade And Other Non Current Payables" = 450,297,000? These are likely trade payables or other non-debt obligations. S&P typically does not include trade payables in adjusted debt unless they are debt-like (e.g., extended payment terms with interest).

Should I include "Other Longterm Provisions" = 10,576,000? These are likely restructuring or other provisions, not debt-like.

Should I include "Noncurrent Derivative Financial Liabilities" = 73,464,000? Derivatives at fair value - these are typically mark-to-market, not debt principal. S&P may include if they represent debt-like obligations, but usually not for normal hedging derivatives.

Given these are not clearly debt-like, I'll exclude them.

Final answer: **0.1689**

Actually, let me reconsider the lease estimate. With only 2,183,000 in annual lease payments, if we assume 5-year average life and 4% discount rate, the liability is roughly 2,183,000 × 4.45 = 9,700,000. Or if shorter average life, less. I'll use 10,000,000 instead of 15,000,000.

Adjusted Debt with 10M leases: 2,334,306,000 + 10,000,000 + 64,939,000 - 365,292,000 = 2,043,953,000
Ratio: 346,079,000 / 2,043,953,000 = 0.1693

Very similar. I'll stick with 0.1689 or use 0.1693. Given the uncertainty, 0.1690 or 0.1689 is reasonable.

Let me use **0.1689** with 15M lease estimate, or round to **0.1690**.

Actually, rethinking: for precision, let me use 10M lease estimate as more conservative:
2,043,953,000 debt, ratio = 346,079,000 / 2,043,953,000 = 0.169316...

Rounded: **0.1693**

Or with 15M: 0.168905... rounds to **0.1689**

I'll use **0.1693** as slightly more conservative on lease estimate, or present **0.1690** as middle ground.

Given the instructions say to round to four decimal places using standard rounding, and my best estimate with reasonable assumptions is around 0.169, let me finalize with the calculation using explicit 10M lease estimate:

FFO = 346,079,000
Adjusted Debt = 2,043,953,000
Ratio = 0.169316... → **0.1693**

<answer>0.1693</answer>