Statement Of Changes In Equity [Abstract]
| Concept |
2023-04-01 to 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 |
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 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
As at 2023-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||
| Equity | — |
111,511,000
GBP
|
3,091,391,000
GBP
|
2,078,568,000
GBP
|
— |
91,641,000
GBP
|
883,890,000
GBP
|
17,422,000
GBP
|
— |
3,183,032,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,978,091,000
GBP
|
3,058,310,000
GBP
|
883,669,000
GBP
|
17,422,000
GBP
|
— | — | — | — |
1,941,223,000
GBP
|
80,219,000
GBP
|
— | — |
135,777,000
GBP
|
221,408,000
GBP
|
2,905,184,000
GBP
|
1,783,033,000
GBP
|
17,422,000
GBP
|
883,321,000
GBP
|
2,970,563,000
GBP
|
65,379,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
— | — | — |
326,255,000
GBP
|
— | — | — |
340,538,000
GBP
|
— |
–
GBP
|
–
GBP
|
326,255,000
GBP
|
14,283,000
GBP
|
33,764,000
GBP
|
374,302,000
GBP
|
28,872,000
GBP
|
375,674,000
GBP
|
334,022,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
334,022,000
GBP
|
12,780,000
GBP
|
— | — |
–
GBP
|
346,802,000
GBP
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — |
36,120,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
88,757,000
GBP
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
33,476,000
GBP
|
— | — | — |
292,686,000
GBP
|
— | — | — |
304,418,000
GBP
|
— |
–
GBP
|
–
GBP
|
326,162,000
GBP
|
11,732,000
GBP
|
— | — | — | — |
243,242,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
336,033,000
GBP
|
14,803,000
GBP
|
— | — |
92,791,000
GBP
|
258,045,000
GBP
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
–
GBP
|
— | — | — |
188,817,000
GBP
|
— | — | — |
189,127,000
GBP
|
— |
–
GBP
|
–
GBP
|
188,817,000
GBP
|
310,000
GBP
|
— | — | — | — |
177,843,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
177,843,000
GBP
|
129,000
GBP
|
— | — |
–
GBP
|
177,972,000
GBP
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
9,210,000
GBP
|
— | — | — |
9,210,000
GBP
|
— | — | — |
9,210,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — |
7,160,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
7,160,000
GBP
|
7,160,000
GBP
|
— | — | — | — | — | — | — | — |