Statement Of Changes In Equity [Abstract]
| Concept |
2022-07-31 to 2023-07-29 |
2022-07-31 to 2023-07-29 |
2022-07-31 to 2023-07-29 |
2021-08-01 to 2022-07-30 |
2021-08-01 to 2022-07-30 |
2021-08-01 to 2022-07-30 |
|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||
| Statement of changes in equity [line items] | ||||||
| Purchase of treasury shares |
148,000
GBP
|
148,000
GBP
|
— |
1,476,000
GBP
|
1,476,000
GBP
|
— |
| Sale or issue of treasury shares |
-
GBP
|
510,000
GBP
|
510,000
GBP
|
1,344,000
GBP
|
40,000
GBP
|
1,304,000
GBP
|