Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2023-02-01 to 2024-01-31 |
2022-02-01 to 2023-01-31 |
|---|---|---|
| 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 |
15,400,000
GBP
|
9,700,000
GBP
|
| Other income |
5,000,000
GBP
|
–
GBP
|
| Tax expense (income) |
16,000,000
GBP
|
400,000
GBP
|