Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2021-02-01 to 2022-01-31 |
2020-02-01 to 2021-01-31 |
|---|---|---|
| Statement of changes in net assets available for benefits [abstract] | ||
| Reconciliation of changes in net assets available for benefits [abstract] | ||
| Changes in net assets available for benefits [abstract] | ||
| Investment income |
300,000
GBP
|
700,000
GBP
|
| Tax expense (income) |
4,500,000
GBP
|
6,600,000
GBP
|