Borrowings - Schedule of lease obligations (Details) - GBP (£) £ in Millions |
Mar. 31, 2024 |
Mar. 31, 2023 |
|---|---|---|
| Disclosure of maturity analysis for non-derivative financial liabilities [line items] | ||
| Gross lease liabilities | £ 1,010 | £ 916 |
| Less: finance charges allocated to future periods | (231) | (202) |
| Lease liabilities | 779 | 714 |
| Less than 1 year | ||
| Disclosure of maturity analysis for non-derivative financial liabilities [line items] | ||
| Gross lease liabilities | 133 | 118 |
| Lease liabilities | 114 | 96 |
| 1 to 5 years | ||
| Disclosure of maturity analysis for non-derivative financial liabilities [line items] | ||
| Gross lease liabilities | 370 | 318 |
| Lease liabilities | 300 | 269 |
| More than 5 years | ||
| Disclosure of maturity analysis for non-derivative financial liabilities [line items] | ||
| Gross lease liabilities | 507 | 480 |
| Lease liabilities | £ 365 | £ 349 |