Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2022-12-26 to 2023-12-31 |
2022-12-26 to 2023-12-31 |
2022-12-26 to 2023-12-31 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
|---|---|---|---|---|---|---|
| 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] | ||||||
| Other income |
42,900,000
GBP
|
40,600,000
GBP
|
2,300,000
GBP
|
–
GBP
|
1,000,000
GBP
|
1,000,000
GBP
|
| Administrative expenses |
161,700,000
GBP
|
–
GBP
|
161,700,000
GBP
|
–
GBP
|
131,800,000
GBP
|
131,800,000
GBP
|
| Tax expense (income) |
27,300,000
GBP
|
1,300,000
GBP
|
26,000,000
GBP
|
–
GBP
|
17,300,000
GBP
|
17,300,000
GBP
|