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 |
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 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||
| Property, plant and equipment |
25,882,000
GBP
|
— | — | — | — | — |
26,387,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
18,613,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
2,141,000
GBP
|
— | — | — | — | — |
2,647,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,438,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
19,054,000
GBP
|
— | — | — | — | — |
13,278,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
8,478,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current tax assets |
771,000
GBP
|
— | — | — | — | — |
7,396,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,615,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
49,707,000
GBP
|
— | — | — | — | — |
71,784,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
151,455,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||
| Issued capital |
19,297,000
GBP
|
— | — | — | — | — |
19,209,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
19,073,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings |
255,758,000
GBP
|
— | — | — | — | — |
201,817,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
155,199,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Share premium |
406,184,000
GBP
|
— | — | — | — | — |
405,463,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
404,726,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
180,635,000
GBP
|
255,758,000
GBP
|
3,449,000
GBP
|
406,184,000
GBP
|
19,297,000
GBP
|
7,463,000
GBP
|
233,767,000
GBP
|
405,463,000
GBP
|
3,449,000
GBP
|
201,817,000
GBP
|
19,209,000
GBP
|
7,463,000
GBP
|
155,199,000
GBP
|
3,449,000
GBP
|
7,463,000
GBP
|
—
GBP
|
—
GBP
|
280,655,000
GBP
|
—
GBP
|
279,512,000
GBP
|
3,449,000
GBP
|
404,726,000
GBP
|
—
GBP
|
154,056,000
GBP
|
1,143,000
GBP
|
1,143,000
GBP
|
19,073,000
GBP
|
7,463,000
GBP
|
404,726,000
GBP
|
19,073,000
GBP
|