Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2024-12-28 |
As at 2024-12-28 |
As at 2024-12-28 |
As at 2024-12-28 |
As at 2024-12-28 |
As at 2023-12-30 |
As at 2023-12-30 |
As at 2023-12-30 |
As at 2023-12-30 |
As at 2023-12-30 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||||
| Assets | — | — |
1,319,700,000
GBP
|
— | — | — | — | — |
1,129,700,000
GBP
|
— | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | |||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | |||||||||||||||
| Liabilities | — | — |
749,200,000
GBP
|
— | — | — | — | — |
598,800,000
GBP
|
— | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | |||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | |||||||||||||||
| Disclosure of fair value measurement of equity [line items] | |||||||||||||||
| Equity |
400,000
GBP
|
543,000,000
GBP
|
570,500,000
GBP
|
2,000,000
GBP
|
25,100,000
GBP
|
503,400,000
GBP
|
25,100,000
GBP
|
2 .0
GBP
|
530,900,000
GBP
|
400,000
GBP
|
446,000,000
GBP
|
23,100,000
GBP
|
400,000
GBP
|
420,500,000
GBP
|
2 .0
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |