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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — | — |
5,000,000
GBP
|
— |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables | — | — | — | — |
1,400,000
GBP
|
— |
3,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — |
—
GBP
|
— |
6,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — |
62,800,000
GBP
|
— |
104,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||
| Trade and other current receivables | — | — | — | — |
20,400,000
GBP
|
— |
16,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — |
2 21.4
GBP
|
— |
1 7 7. 7
GBP
|
— | — | — | — | — | — |
2 24. 0
GBP
|
— | — | — | — |
| Current assets | — | — | — | — |
310. 4
GBP
|
— |
279,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — |
373 .2
GBP
|
— |
3 84.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — | — |
400,000
GBP
|
— |
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — |
8 4. 9
GBP
|
— |
4 8 . 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — |
2 9 3 .1
GBP
|
— |
2 9 3 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity |
2 9 3 .1
GBP
|
0. 4
GBP
|
14 . 2
GBP
|
8 4 .9
GBP
|
246,800,000
GBP
|
24 .0
GBP
|
28 4. 0
GBP
|
2 9 3 .1
GBP
|
22,200,000
GBP
|
4 8 .6
GBP
|
400,000
GBP
|
16,900,000
GBP
|
35 . 6
GBP
|
28 8 .0
GBP
|
293,000,000
GBP
|
11 .1
GBP
|
400,000
GBP
|
1 9 .1
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Current liabilities [abstract] | ||||||||||||||||||
| Trade and other current payables | — | — | — | — |
5 4.3
GBP
|
— |
31,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — |
1 1 7. 7
GBP
|
— |
63,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — |
126. 4
GBP
|
— |
100,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — | — |
373. 2
GBP
|
— |
38 4.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — |