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 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 |
136 . 2
GBP
|
— | — | — | — | — | — | — |
16 0 .7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
58 .1
GBP
|
— | — | — | — | — | — | — |
5 9 .7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Goodwill |
56 5. 5
GBP
|
— | — | — | — | — | — | — |
6 06 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
167 .1
GBP
|
— | — | — | — | — | — | — |
18 4 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners |
9 7. 5
GBP
|
— | — | — | — | — | — | — |
1 .7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets |
7. 2
GBP
|
— | — | — | — | — | — | — |
8,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
26 .6
GBP
|
— | — | — | — | — | — | — |
16 .2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
138 . 5
GBP
|
— | — | — | — | — | — | — |
2 28 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
1 , 8 1 7. 7
GBP
|
— | — | — | — | — | — | — |
1,948 .0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital |
5,300,000
GBP
|
— | — | — | — | — | — | — |
5,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
1,030,000,000
GBP
|
— | — | — | — | — | — | — |
1,113,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
231,400,000
GBP
|
— | — | — | — | — | — | — |
2 31.4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
1, 315. 9
GBP
|
1,030,000,000
GBP
|
1,200,000
GBP
|
2 31.4
GBP
|
5,300,000
GBP
|
4 3.0
GBP
|
3 .1
GBP
|
1,900,000
GBP
|
1,436. 9
GBP
|
231,400,000
GBP
|
1,000,000
GBP
|
1 ,113 .0
GBP
|
5,500,000
GBP
|
86 .0
GBP
|
3 .1
GBP
|
3 .1
GBP
|
9 5 7. 6
GBP
|
0 .7
GBP
|
1,26 1. 3
GBP
|
3. 5
GBP
|
3,100,000
GBP
|
2 31.4
GBP
|
66,200,000
GBP
|
5,800,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Current tax liabilities |
12 .6
GBP
|
— | — | — | — | — | — | — |
14 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
1. 3
GBP
|
— | — | — | — | — | — | — |
15 .6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
501 .8
GBP
|
— | — | — | — | — | — | — |
5 11 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |