Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2021-11-01 to 2022-10-31 |
2021-11-01 to 2022-10-31 |
2021-11-01 to 2022-10-31 |
2020-11-01 to 2021-10-31 |
2020-11-01 to 2021-10-31 |
2020-11-01 to 2021-10-31 |
|---|---|---|---|---|---|---|
| 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] | ||||||
| Tax expense (income) |
4,400,000
GBP
|
5,700,000
GBP
|
1,300,000
GBP
|
8,300,000
GBP
|
1,000,000
GBP
|
7,300,000
GBP
|