Statement Of Financial Position [Abstract]
| Concept |
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 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment | — | — | — |
131,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
142,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current tax assets | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
24,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
88,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
78,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
2,06 4
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,9 21
GBP
|
— | — | — |
2, 253
GBP
|
— | — | — | — | — |
| Assets | — | — | — |
5 0 ,74 0
GBP
|
— | — | — | — | — | — | — | — | — | — |
6 7, 3 7 2
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital | — | — | — |
11 6
GBP
|
— | — | — | — | — | — | — | — | — | — |
12 5
GBP
|
— | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
1, 4 8 2
GBP
|
— | — | — | — | — | — | — | — | — | — |
1, 49 5
GBP
|
— | — | — | — | — | — | — | — | — |
| Share premium | — | — | — |
58,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
58,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity |
1,4 8 2
GBP
|
17,000,000
GBP
|
1,000,000
GBP
|
1,7 39
GBP
|
25,000,000
GBP
|
58,000,000
GBP
|
42,000,000
GBP
|
116,000,000
GBP
|
1, 4 9 5
GBP
|
12 5
GBP
|
14 9
GBP
|
1,000,000
GBP
|
58,000,000
GBP
|
42,000,000
GBP
|
1 ,878
GBP
|
8,000,000
GBP
|
1,000,000
GBP
|
58,000,000
GBP
|
2 ,071
GBP
|
14 9
GBP
|
1,6 8 5
GBP
|
45,000,000
GBP
|
–
GBP
|
13 3
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Provisions [abstract] | ||||||||||||||||||||||||
| Provisions | — | — | — |
93,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
77,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current tax liabilities | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — |
13 9
GBP
|
— | — | — | — | — | — | — | — | — | — |
10 6
GBP
|
— | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
49, 0 01
GBP
|
— | — | — | — | — | — | — | — | — | — |
6 5,494
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
5 0 ,74 0
GBP
|
— | — | — | — | — | — | — | — | — | — |
6 7, 3 7 2
GBP
|
— | — | — | — | — | — | — | — | — |