Statement Of Changes In Equity [Abstract]
| Concept |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||
| Statement of changes in equity [line items] | ||||
| Purchase of treasury shares |
30,000,000
GBP
|
30,000,000
GBP
|
54,000,000
GBP
|
54,000,000
GBP
|