Statement Of Changes In Equity [Abstract]
| Concept |
As at 2024-01-31 |
As at 2024-01-31 |
2023-02-01 to 2024-01-31 |
As at 2024-01-31 |
2023-02-01 to 2024-01-31 |
As at 2024-01-31 |
As at 2024-01-31 |
As at 2024-01-31 |
As at 2024-01-31 |
2023-02-01 to 2024-01-31 |
2023-02-01 to 2024-01-31 |
As at 2024-01-31 |
2023-02-01 to 2024-01-31 |
2023-02-01 to 2024-01-31 |
2023-02-01 to 2024-01-31 |
2023-02-01 to 2024-01-31 |
As at 2023-01-31 |
As at 2023-01-31 |
As at 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
As at 2023-01-31 |
2022-02-01 to 2023-01-31 |
As at 2023-01-31 |
As at 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
As at 2023-01-31 |
As at 2023-01-31 |
As at 2022-02-01 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
1,200,000
GBP
|
10,500,000
GBP
|
— |
2,900,000
GBP
|
— |
648,300,000
GBP
|
21,300,000
GBP
|
–
GBP
|
223,500,000
GBP
|
— | — |
452,500,000
GBP
|
— | — | — | — |
365,400,000
GBP
|
8,900,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
— |
21,100,000
GBP
|
648,300,000
GBP
|
— | — | — | — | — |
309,700,000
GBP
|
3,200,000
GBP
|
651,400,000
GBP
|
–
GBP
|
–
GBP
|
648,300,000
GBP
|
648,300,000
GBP
|
–
GBP
|
700,000
GBP
|
7,400,000
GBP
|
21,100,000
GBP
|
22,400,000
GBP
|
2,300,000
GBP
|
–
GBP
|
800,000
GBP
|
–
GBP
|
24,700,000
GBP
|
7,400,000
GBP
|
1,500,000
GBP
|
652,900,000
GBP
|
651,400,000
GBP
|
–
GBP
|
–
GBP
|
700,000
GBP
|
–
GBP
|
800,000
GBP
|
21,100,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — | — | — |
113,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
273,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — |
30,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
16,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
–
GBP
|
— |
143,800,000
GBP
|
— | — | — | — |
–
GBP
|
143,500,000
GBP
|
— |
–
GBP
|
300,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — |
287,400,000
GBP
|
–
GBP
|
— |
–
GBP
|
— | — |
–
GBP
|
289,900,000
GBP
|
–
GBP
|
–
GBP
|
2,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — |
–
GBP
|
— |
–
GBP
|
— | — | — | — |
–
GBP
|
200,000
GBP
|
— |
200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — |
1,200,000
GBP
|
— |
800,000
GBP
|
— | — | — | — |
–
GBP
|
2,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
–
GBP
|
— |
–
GBP
|
— | — | — | — |
3,400,000
GBP
|
3,400,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
3,900,000
GBP
|
— |
–
GBP
|
— | — |
–
GBP
|
3,900,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |