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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||
| Property, plant and equipment |
2,999,000
GBP
|
— | — | — | — | — |
3,925,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
6,834,000
GBP
|
— | — | — | — | — |
7,877,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
2,886,000
GBP
|
— | — | — | — | — |
2,772,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
-
GBP
|
— | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
114,688,000
GBP
|
— | — | — | — | — |
113,410,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||
| Trade and other current receivables |
1,363,000
GBP
|
— | — | — | — | — |
2,526,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Current tax assets, current |
-
GBP
|
— | — | — | — | — |
1,477,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
32,783,000
GBP
|
— | — | — | — | — |
114,577,000
GBP
|
— | — | — | — | — |
77,956,000
GBP
|
— | — | — | — | — |
| Current assets |
109,281,000
GBP
|
— | — | — | — | — |
227,728,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Assets |
223,969,000
GBP
|
— | — | — | — | — |
341,138,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital |
15,621,000
GBP
|
— | — | — | — | — |
15,621,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
293,441,000
GBP
|
— | — | — | — | — |
237,082,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Share premium |
180,019,000
GBP
|
— | — | — | — | — |
180,019,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
255,000
GBP
|
— | — | — | — | — |
255,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity |
97,546,000
GBP
|
–
GBP
|
180,019,000
GBP
|
293,441,000
GBP
|
15,621,000
GBP
|
255,000
GBP
|
41,187,000
GBP
|
237,082,000
GBP
|
255,000
GBP
|
180,019,000
GBP
|
–
GBP
|
15,621,000
GBP
|
11,536,000
GBP
|
207,727,000
GBP
|
–
GBP
|
15,621,000
GBP
|
551,000
GBP
|
180,019,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||
| Non-current liabilities |
5,695,000
GBP
|
— | — | — | — | — |
336,178,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||
| Current provisions |
30,690,000
GBP
|
— | — | — | — | — |
25,643,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
28,365,000
GBP
|
— | — | — | — | — |
18,375,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
315,820,000
GBP
|
— | — | — | — | — |
46,147,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
223,969,000
GBP
|
— | — | — | — | — |
341,138,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |