Statement Of Financial Position [Abstract]
| Concept |
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 2022-12-31 |
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 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||
| Property, plant and equipment |
11 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
13 1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
94,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
88,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
1, 7 8 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,06 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1, 9 21
GBP
|
— |
| Assets |
4 6 , 4 17
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
5 0 , 74 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||
| Issued capital |
115,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
11 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
989,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1, 4 8 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
58,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
58,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
1, 5 4 8
GBP
|
1,000,000
GBP
|
58,000,000
GBP
|
346,000,000
GBP
|
41,000,000
GBP
|
989,000,000
GBP
|
11 5
GBP
|
–
GBP
|
–
GBP
|
1, 4 8 2
GBP
|
17,000,000
GBP
|
1,000,000
GBP
|
1,7 3 9
GBP
|
–
GBP
|
25,000,000
GBP
|
58,000,000
GBP
|
42,000,000
GBP
|
116,000,000
GBP
|
–
GBP
|
1, 49 5
GBP
|
12 5
GBP
|
149,000,000
GBP
|
1,000,000
GBP
|
58,000,000
GBP
|
42,000,000
GBP
|
1,87 8
GBP
|
8,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||
| Provisions [abstract] | |||||||||||||||||||||||||||
| Provisions |
69,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
93,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax liabilities |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
24,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
13 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
44,869,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
49, 0 01
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
4 6 , 4 17
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
5 0 , 74 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |