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 | — | — | — |
1, 0 69 . 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
1 ,11 0 . 0
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 | — | — | — |
3 84 .4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
42 8.6
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 |
6. 2
GBP
|
31 9.4
GBP
|
1 3 7. 5
GBP
|
6 85.4
GBP
|
6 8 4 .7
GBP
|
1 7 7.1
GBP
|
0 .7
GBP
|
23 .8
GBP
|
3 3 .1
GBP
|
3 06 .7
GBP
|
0. 9
GBP
|
68 0.5
GBP
|
3 3 .1
GBP
|
6. 9
GBP
|
3 7. 9
GBP
|
13 2 .6
GBP
|
1 7 7.1
GBP
|
6 8 1. 4
GBP
|
70 5. 0
GBP
|
0. 8
GBP
|
13 6 .7
GBP
|
3 7. 9
GBP
|
70 5. 8
GBP
|
17 7. 1
GBP
|
3 3 1. 8
GBP
|
11 . 6
GBP
|
3 3 .1
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |