Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2023-01-01 to 2023-12-31 |
|---|---|---|---|---|
| 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 |
—
GBP
|
2 .8
GBP
|
2,800,000
GBP
|
3,600,000
GBP
|
| Tax expense (income) |
—
GBP
|
0. 5
GBP
|
0. 5
GBP
|
1,700,000
GBP
|