To estimate the leverage trend for REN – Redes Energéticas Nacionais, SGPS, S.A. based on the 2022 annual report data, we look at the change in debt levels and overall financial position compared to the previous year.

1.  **Debt Analysis**: "Longterm Borrowings" decreased significantly from 2,390,852,000 EUR (2022-01-01) to 1,695,362,000 EUR (2023-01-01). While "Current Borrowings And Current Portion Of Noncurrent Borrowings" increased from 375,221,000 EUR to 638,944,000 EUR, the total debt (sum of long-term and current borrowings) decreased from 2,766,073,000 EUR to 2,334,306,000 EUR.
2.  **Equity/Assets**: Equity increased from 1,409,830,000 EUR to 1,517,534,000 EUR, improving the equity base.
3.  **Profitability**: The company's profit for the year increased from 97,153,000 EUR to 111,771,000 EUR. Operating profit also grew from 218,863,000 EUR to 239,721,000 EUR.
4.  **Leverage Context**: With a notable reduction in total debt and an increase in both equity and profitability, the company's leverage ratio (Total Debt / Equity) has moved in a favorable direction, indicating a reduction in financial risk.

Given that the debt burden has reduced while financial performance and equity have improved, the leverage trend is considered to be improving.

<answer>Improving</answer>