Statement Of Financial Position [Abstract]
| Concept |
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 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-01-01 |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||
| Property, plant and equipment |
2,69 8. 8
GBP
|
— | — | — | — | — | — | — |
2,3 8 8. 0
GBP
|
— | — | — | — | — | — | — |
2 , 310 . 7
GBP
|
— | — | — | — | — | — | — | — |
| Right-of-use assets |
12 2 . 2
GBP
|
— | — | — | — | — | — | — |
13 8 . 3
GBP
|
— | — | — | — | — | — | — |
119 . 8
GBP
|
— | — | — | — | — | — | — | — |
| Goodwill |
41 6 . 7
GBP
|
— | — | — | — | — | — | — |
4 24 . 2
GBP
|
— | — | — | — | — | — | — |
416 . 3
GBP
|
— | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
81. 5
GBP
|
— | — | — | — | — | — | — |
14 2 . 3
GBP
|
— | — | — | — | — | — | — |
18 8 . 6
GBP
|
— | — | — | — | — | — | — | — |
| Investments accounted for using equity method |
8 .9
GBP
|
— | — | — | — | — | — | — |
6,900,000
GBP
|
— | — | — | — | — | — | — |
5,500,000
GBP
|
— | — | — | — | — | — | — | — |
| Deferred tax assets |
52. 9
GBP
|
— | — | — | — | — | — | — |
3 7. 3
GBP
|
— | — | — | — | — | — | — |
2 8 .7
GBP
|
— | — | — | — | — | — | — | — |
| Cash and cash equivalents |
3 79. 5
GBP
|
— | — | — | — | — | — | — |
23 8.0
GBP
|
— | — | — | — | — | — | — |
3 17. 4
GBP
|
— | — | — |
3 1 7. 4
GBP
|
— | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||
| Issued capital |
4 9 .1
GBP
|
— | — | — | — | — | — | — |
4 7. 9
GBP
|
— | — | — | — | — | — | — |
4 7. 7
GBP
|
— | — | — | — | — | — | — | — |
| Retained earnings |
666,400,000
GBP
|
— | — | — | — | — | — | — |
193 . 8
GBP
|
— | — | — | — | — | — | — |
19 8 . 3
GBP
|
— | — | — | — | — | — | — | — |
| Share premium |
4 41. 2
GBP
|
— | — | — | — | — | — | — |
43 3. 3
GBP
|
— | — | — | — | — | — | — |
432. 2
GBP
|
— | — | — | — | — | — | — | — |
| Other reserves |
588,200,000
GBP
|
— | — | — | — | — | — | — |
7 4 7. 7
GBP
|
— | — | — | — | — | — | — |
70 6.0
GBP
|
— | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
1,97 1.0
GBP
|
— | — | — | — | — | — | — |
1 , 31 0 . 8
GBP
|
— | — | — | — | — | — | — |
1, 2 85 . 3
GBP
|
— | — | — | — | — | — | — | — |
| Non-controlling interests |
12 . 0
GBP
|
— | — | — | — | — | — | — |
13 . 4
GBP
|
— | — | — | — | — | — | — |
2 1.5
GBP
|
— | — | — | — | — | — | — | — |
| Equity |
1,9 8 3. 0
GBP
|
666,400,000
GBP
|
588,200,000
GBP
|
12 . 0
GBP
|
4 41. 2
GBP
|
4 9 .1
GBP
|
207 .4
GBP
|
18 .7
GBP
|
1, 324 . 2
GBP
|
7 4 7. 7
GBP
|
13 . 4
GBP
|
433. 3
GBP
|
193 . 8
GBP
|
4 7. 9
GBP
|
4 0 .1
GBP
|
15 2 . 0
GBP
|
1,3 0 6 . 8
GBP
|
19 8 . 3
GBP
|
78 .5
GBP
|
706 .0
GBP
|
1,3 0 6 . 8
GBP
|
1 7 7. 4
GBP
|
432 . 2
GBP
|
21. 5
GBP
|
4 7. 7
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||
| Current tax liabilities |
20 . 6
GBP
|
— | — | — | — | — | — | — |
2 3 .3
GBP
|
— | — | — | — | — | — | — |
3. 4
GBP
|
— | — | — | — | — | — | — | — |
| Deferred tax liabilities |
3 1 7.1
GBP
|
— | — | — | — | — | — | — |
14 1. 6
GBP
|
— | — | — | — | — | — | — |
22 5.3
GBP
|
— | — | — | — | — | — | — | — |