Statement Of Changes In Equity [Abstract]
| Concept |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — | — |
1,450,700,000
GBP
|
— |
2,500,000
GBP
|
157,100,000
GBP
|
755,000,000
GBP
|
288,100,000
GBP
|
— | — | — | — |
248,000,000
GBP
|
— |
431,300,000
GBP
|
— | — | — | — | — |
1,400,000
GBP
|
398,200,000
GBP
|
174,600,000
GBP
|
157,100,000
GBP
|
— |
1,162,600,000
GBP
|
— | — | — | — |
570,600,000
GBP
|
1,125,200,000
GBP
|
237,600,000
GBP
|
159,500,000
GBP
|
157,100,000
GBP
|
400,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
28,700,000
GBP
|
28,100,000
GBP
|
28,100,000
GBP
|
28,700,000
GBP
|
— |
56,800,000
GBP
|
— | — | — | — |
1,100,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
57,900,000
GBP
|
— |
9,500,000
GBP
|
21,000,000
GBP
|
12,500,000
GBP
|
12,500,000
GBP
|
21,000,000
GBP
|
— | — | — | — |
8,500,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
— | — | — | — | — | — |
| Other comprehensive income | — | — |
700,000
GBP
|
–
GBP
|
— |
700,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
700,000
GBP
|
— |
17,800,000
GBP
|
— | — |
17,800,000
GBP
|
–
GBP
|
— | — | — | — |
17,800,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
| Comprehensive income | — | — |
27,400,000
GBP
|
28,700,000
GBP
|
— |
56,100,000
GBP
|
— | — | — | — |
1,100,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
57,200,000
GBP
|
— |
27,300,000
GBP
|
— | — |
5,300,000
GBP
|
21,000,000
GBP
|
— | — | — | — |
26,300,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
— | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — |
400,000
GBP
|
— |
400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — |
126,900,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
126,900,000
GBP
|
— |
111,700,000
GBP
|
— | — | — | — | — | — | — | — |
111,700,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — |
2,000,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
2,000,000
GBP
|
— |
1 . 1
GBP
|
— | — | — | — | — | — | — | — |
1 . 1
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |