Disclosure Of Fair Value Measurement [Text Block]
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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 | — | — | — | — | — | — |
8,00 4 .0
GBP
|
— | — | — | — | — | — | — | — |
8,21 0. 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 | — | — | — | — | — | — |
2 , 4 0 7. 6
GBP
|
— | — | — | — | — | — | — | — |
2,579 .4
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 |
4 ,13 1. 2
GBP
|
500,000
GBP
|
20,800,000
GBP
|
4 .8
GBP
|
23,200,000
GBP
|
25 3.5
GBP
|
5,596,400,000
GBP
|
1 ,10 9. 0
GBP
|
4 ,1 3 3 . 6
GBP
|
9 7. 4
GBP
|
4, 1 65. 9
GBP
|
25 3.4
GBP
|
800,000
GBP
|
—
GBP
|
2 9. 0
GBP
|
5 , 6 3 1. 3
GBP
|
4 ,16 3 .9
GBP
|
1,1 0 9. 0
GBP
|
2 7. 0
GBP
|
10 2 . 2
GBP
|
1,1 0 9. 0
GBP
|
5 , 4 5 2 .1
GBP
|
—
GBP
|
2 7. 6
GBP
|
24 5.3
GBP
|
101. 8
GBP
|
1 .1
GBP
|
3 ,9 7 2 . 0
GBP
|
3 ,9 94 .9
GBP
|
4 .7
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |