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 | — |
992 .6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
8 5 9. 1
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 | — |
58 8 . 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
530. 9
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 |
0 . 5
GBP
|
404,200,000
GBP
|
10,000,000
GBP
|
–
GBP
|
1 ,7 8 2 . 2
GBP
|
1,400. 0
GBP
|
12. 5
GBP
|
–
GBP
|
–
GBP
|
1,400 .0
GBP
|
100,000
GBP
|
10,000,000
GBP
|
7. 0
GBP
|
1 ,7 1 1 . 3
GBP
|
328 . 2
GBP
|
–
GBP
|
–
GBP
|
1 , 5 3 7. 1
GBP
|
–
GBP
|
1 4 9.7
GBP
|
1,400. 0
GBP
|
10,000,000
GBP
|
2 .7
GBP
|
100,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |