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 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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||||||||||||||||
| Property, plant and equipment |
2,561,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,7 78
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
5,915,000
GBP
|
— | — | — | — | — | — | — | — | — |
7 ,222
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Goodwill |
23,4 79
GBP
|
— | — | — | — | — | — | — | — | — |
23,4 79
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
20,000
GBP
|
— | — | — | — | — | — | — | — | — |
23,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables |
—
GBP
|
— | — | — | — | — | — | — | — | — |
175,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
33,867,000
GBP
|
— | — | — | — | — | — | — | — | — |
36,060,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||||||||||||||||
| Trade and other current receivables |
5,784,000
GBP
|
— | — | — | — | — | — | — | — | — |
3,921,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
88,442,000
GBP
|
— | — | — | — | — | — | — | — | — |
40,553,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
85,371,000
GBP
|
| Current assets |
152,085,000
GBP
|
— | — | — | — | — | — | — | — | — |
56,624,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
185,952,000
GBP
|
— | — | — | — | — | — | — | — | — |
92,684,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||||||||||
| Issued capital |
100,000
GBP
|
— | — | — | — | — | — | — | — | — |
243,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
456,091,000
GBP
|
— | — | — | — | — | — | — | — | — |
292 ,172
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
930,495,000
GBP
|
— | — | — | — | — | — | — | — | — |
211,158,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
153,999,000
GBP
|
930 ,495
GBP
|
203,739,000
GBP
|
456,091,000
GBP
|
100,000
GBP
|
328,000
GBP
|
524,572,000
GBP
|
292,172,000
GBP
|
54,568,000
GBP
|
62,931,000
GBP
|
60,948,000
GBP
|
67 ,666
GBP
|
—
GBP
|
21,171,000
GBP
|
211,158,000
GBP
|
—
GBP
|
—
GBP
|
19,188,000
GBP
|
—
GBP
|
1,983,000
GBP
|
271,001,000
GBP
|
243,000
GBP
|
2 97
GBP
|
54,568,000
GBP
|
211,158,000
GBP
|
86 ,854
GBP
|
297,000
GBP
|
243,000
GBP
|
184,534,000
GBP
|
239,000
GBP
|
54,568,000
GBP
|
391,000
GBP
|
204,124,000
GBP
|
4 7,838
GBP
|
122,626,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||||||||||||||||
| Non-current provisions |
626,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,549,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
6,314,000
GBP
|
— | — | — | — | — | — | — | — | — |
8 ,75 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||||||||||||||||
| Current provisions |
5,871,000
GBP
|
— | — | — | — | — | — | — | — | — |
11,076,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
14,877,000
GBP
|
— | — | — | — | — | — | — | — | — |
10,286,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
25, 639
GBP
|
— | — | — | — | — | — | — | — | — |
22,986,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
31,953,000
GBP
|
— | — | — | — | — | — | — | — | — |
31,736,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |