Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2023-12-31 |
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As at 2022-12-31 |
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As at 2021-12-31 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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, 13 6 .7
GBP
|
— | — | — | — | — | — | — | — |
1,16 7.7
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 |
344,400,000
GBP
|
— | — | — | — | — | — | — | — |
385. 7
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 |
792,300,000
GBP
|
40 4 .0
GBP
|
139. 9
GBP
|
1,500,000
GBP
|
177 . 1
GBP
|
33,100,000
GBP
|
5 2. 3
GBP
|
15,600,000
GBP
|
7 90 .8
GBP
|
782,000,000
GBP
|
134,900,000
GBP
|
1. 1
GBP
|
1 77 . 1
GBP
|
35 9.8
GBP
|
5. 2
GBP
|
33,100,000
GBP
|
81,200,000
GBP
|
780 .9
GBP
|
6. 2
GBP
|
319,400,000
GBP
|
137 .5
GBP
|
6 8 5 .4
GBP
|
6 8 4 .7
GBP
|
700,000
GBP
|
1 77 . 1
GBP
|
23 .8
GBP
|
33,100,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |