Disclosure Of Fair Value Measurement [Text Block]
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As at 2022-12-31 |
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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 | — | — | — | — | — | — | — |
355,500,000
GBP
|
41 5 .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 | — | — | — | — | — | — | — |
217 .0
GBP
|
2 5 0.8
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 |
222,200,000
GBP
|
22,600,000
GBP
|
15,300,000
GBP
|
4,200,000
GBP
|
9 . 1
GBP
|
37 .4
GBP
|
70 . 9
GBP
|
138,500,000
GBP
|
1 6 4 .9
GBP
|
242 . 3
GBP
|
7 0 .9
GBP
|
3 7. 8
GBP
|
22,600,000
GBP
|
15. 3
GBP
|
2,500,000
GBP
|
9. 1
GBP
|
1 8 3 .9
GBP
|
71 . 4
GBP
|
4 0 . 5
GBP
|
2 2.6
GBP
|
2 55 .4
GBP
|
9. 1
GBP
|
1 5.8
GBP
|
1 1 .1
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |