Disclosure Of Fair Value Measurement [Text Block]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
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As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
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As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
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| Disclosure of fair value measurement [text block] |
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| 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 | — |
456 .6
GBP
|
3 40.0
GBP
|
104,900,000
GBP
|
4 .0
GBP
|
7. 7
GBP
|
452 . 6
GBP
|
41 3 . 2
GBP
|
114 . 8
GBP
|
3,500,000
GBP
|
2 8 7. 2
GBP
|
7. 7
GBP
|
409,700,000
GBP
|
24 5 . 3
GBP
|
10 4.0
GBP
|
361,600,000
GBP
|
356 .9
GBP
|
4 .7
GBP
|
7. 6
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |