Statement Of Changes In Equity [Abstract]
| Concept |
2023-05-01 to 2024-04-28 |
2023-05-01 to 2024-04-28 |
2023-05-01 to 2024-04-28 |
2023-05-01 to 2024-04-28 |
2023-05-01 to 2024-04-28 |
As at 2024-04-28 |
2023-05-01 to 2024-04-28 |
2023-05-01 to 2024-04-28 |
As at 2024-04-28 |
As at 2024-04-28 |
As at 2024-04-28 |
As at 2024-04-28 |
As at 2024-04-28 |
As at 2024-04-28 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
2022-05-02 to 2023-04-30 |
As at 2023-04-30 |
2022-05-02 to 2023-04-30 |
2022-05-02 to 2023-04-30 |
2022-05-02 to 2023-04-30 |
2022-05-02 to 2023-04-30 |
2022-05-02 to 2023-04-30 |
2022-05-02 to 2023-04-30 |
As at 2022-05-01 |
As at 2022-05-01 |
As at 2022-05-01 |
As at 2022-05-01 |
As at 2022-05-01 |
As at 2022-05-01 |
As at 2022-05-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — | — | — | — | — |
523,000,000
GBP
|
— | — |
4,400,000
GBP
|
2,200,000
GBP
|
147,100,000
GBP
|
394,100,000
GBP
|
23,400,000
GBP
|
3,000,000
GBP
|
147,100,000
GBP
|
469,300,000
GBP
|
337,000,000
GBP
|
2,800,000
GBP
|
3,000,000
GBP
|
2,200,000
GBP
|
— |
18,400,000
GBP
|
— | — | — | — | — | — |
3,000,000
GBP
|
2,200,000
GBP
|
147,100,000
GBP
|
6,700,000
GBP
|
214,300,000
GBP
|
5,800,000
GBP
|
361,300,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
59,100,000
GBP
|
— |
–
GBP
|
59,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
121,800,000
GBP
|
— |
–
GBP
|
–
GBP
|
121,800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
| Other comprehensive income |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
900,000
GBP
|
— |
1,600,000
GBP
|
700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,800,000
GBP
|
— |
–
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
–
GBP
|
3,000,000
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
60,000,000
GBP
|
— |
1,600,000
GBP
|
58,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
119,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
122,000,000
GBP
|
–
GBP
|
–
GBP
|
3,000,000
GBP
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2,100,000
GBP
|
— |
–
GBP
|
2,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3,500,000
GBP
|
— |
–
GBP
|
–
GBP
|
3,500,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |