Statement Of Changes In Equity [Abstract]
| Concept |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||
| Statement of changes in equity [line items] | ||||||||||||
| Dividends recognised as distributions to owners of parent |
–
GBP
|
9 8 .1
GBP
|
–
GBP
|
–
GBP
|
9 8 .1
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
98,500,000
GBP
|
–
GBP
|
98,500,000
GBP
|
| Decrease (increase) through tax on share-based payment transactions, equity |
–
GBP
|
2 .5
GBP
|
–
GBP
|
–
GBP
|
2,500,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
9 . 8
GBP
|
–
GBP
|
9. 8
GBP
|
| Purchase of treasury shares |
0 .1
GBP
|
72 . 3
GBP
|
–
GBP
|
100,000
GBP
|
72 . 3
GBP
|
–
GBP
|
–
GBP
|
0. 2
GBP
|
–
GBP
|
1 5 5 . 4
GBP
|
0 . 2
GBP
|
1 5 5 . 4
GBP
|