Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2004-04-01 |
As at 2004-04-01 |
As at 2004-04-01 |
As at 2004-04-01 |
As at 2003-04-01 |
As at 2001-04-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — |
2,978,091,000
GBP
|
3,058,310,000
GBP
|
883,669,000
GBP
|
17,422,000
GBP
|
— | — | — | — |
80,219,000
GBP
|
1,941,223,000
GBP
|
— | — |
135,777,000
GBP
|
— | — | — | — | — | — |
221,408,000
GBP
|
2,905,184,000
GBP
|
— | — |
17,422,000
GBP
|
883,321,000
GBP
|
1,783,033,000
GBP
|
— |
2,970,563,000
GBP
|
65,379,000
GBP
|
115,291,000
GBP
|
17,422,000
GBP
|
882,924,000
GBP
|
2,705,644,000
GBP
|
1,631,797,000
GBP
|
58,210,000
GBP
|
2,647,434,000
GBP
|
221,408,000
GBP
|
65,379,000
GBP
|
2,905,184,000
GBP
|
883,321,000
GBP
|
1,783,033,000
GBP
|
17,422,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
28,872,000
GBP
|
375,674,000
GBP
|
334,022,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
12,780,000
GBP
|
334,022,000
GBP
|
— | — |
–
GBP
|
346,802,000
GBP
|
— |
312,373,000
GBP
|
13,629,000
GBP
|
–
GBP
|
312,373,000
GBP
|
–
GBP
|
–
GBP
|
— | — |
43,841,000
GBP
|
369,843,000
GBP
|
— | — | — |
326,002,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
88,757,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
98,649,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
243,242,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
14,803,000
GBP
|
336,033,000
GBP
|
— | — |
92,791,000
GBP
|
258,045,000
GBP
|
— |
411,485,000
GBP
|
13,166,000
GBP
|
–
GBP
|
311,835,000
GBP
|
99,650,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
424,651,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
177,843,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
129,000
GBP
|
177,843,000
GBP
|
— | — |
–
GBP
|
177,972,000
GBP
|
— |
160,599,000
GBP
|
6,909,000
GBP
|
–
GBP
|
160,599,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
167,508,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
7,160,000
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
7,160,000
GBP
|
7,160,000
GBP
|
— |
6,467,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
6,467,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
6,467,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |