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 |
2 7, 5 6 6 . 7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2 4, 5 3 1 .9
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 |
25,365,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
22,507 .5
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 |
2, 201.0
GBP
|
1,355. 1
GBP
|
–
GBP
|
2 .4
GBP
|
13,200,000
GBP
|
3,389,400,000
GBP
|
2 . 2
GBP
|
4. 3
GBP
|
1. 3
GBP
|
0. 3
GBP
|
150,000,000
GBP
|
3. 5
GBP
|
3 , 2 1 5 .1
GBP
|
2,024. 4
GBP
|
0. 6
GBP
|
150,000,000
GBP
|
1,3 55 .3
GBP
|
700,000
GBP
|
1 3 .4
GBP
|
1 .1
GBP
|
4,500,000
GBP
|
–
GBP
|
1,608 .6
GBP
|
60,000,000
GBP
|
1, 3 5 9. 8
GBP
|
–
GBP
|
4. 0
GBP
|
1,000,000
GBP
|
–
GBP
|
7. 8
GBP
|
1, 35 5. 3
GBP
|
1,67 6.9
GBP
|
1,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |