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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||
| Assets [abstract] | |||||||||||||||
| Non-current assets [abstract] | |||||||||||||||
| Property, plant and equipment | — | — | — |
11,800,000
GBP
|
— | — |
13,500,000
GBP
|
— | — | — | — | — | — | — | — |
| Trade and other non-current receivables | — | — | — |
12,000,000
GBP
|
— | — |
6,300,000
GBP
|
— | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
3,200,000
GBP
|
— | — |
3,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Non-current assets | — | — | — |
52,300,000
GBP
|
— | — |
48,700,000
GBP
|
— | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||
| Current inventories | — | — | — |
500,000
GBP
|
— | — |
500,000
GBP
|
— | — | — | — | — | — | — | — |
| Trade and other current receivables | — | — | — |
52,900,000
GBP
|
— | — |
55,300,000
GBP
|
— | — | — | — | — | — | — | — |
| Current tax assets, current | — | — | — |
200,000
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
29,300,000
GBP
|
— | — |
22,500,000
GBP
|
— | — | — |
20,300,000
GBP
|
— | — | — | — |
| Current assets | — | — | — |
167,100,000
GBP
|
— | — |
132,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Assets | — | — | — |
219,400,000
GBP
|
— | — |
181,300,000
GBP
|
— | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital | — | — | — |
5,300,000
GBP
|
— | — |
4,400,000
GBP
|
— | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
34,500,000
GBP
|
— | — |
29,500,000
GBP
|
— | — | — | — | — | — | — | — |
| Share premium | — | — | — |
13,600,000
GBP
|
— | — |
4,400,000
GBP
|
— | — | — | — | — | — | — | — |
| Equity |
13,600,000
GBP
|
5,300,000
GBP
|
34,500,000
GBP
|
53,400,000
GBP
|
–
GBP
|
400,000
GBP
|
38,700,000
GBP
|
4,400,000
GBP
|
29,500,000
GBP
|
4,400,000
GBP
|
26,500,000
GBP
|
17,200,000
GBP
|
700,000
GBP
|
4,200,000
GBP
|
4,400,000
GBP
|
| Liabilities [abstract] | |||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||
| Trade and other non-current payables | — | — | — |
3,100,000
GBP
|
— | — |
2,500,000
GBP
|
— | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — |
20,100,000
GBP
|
— | — |
21,100,000
GBP
|
— | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||
| Trade and other current payables | — | — | — |
126,100,000
GBP
|
— | — |
96,100,000
GBP
|
— | — | — | — | — | — | — | — |
| Current liabilities | — | — | — |
145,900,000
GBP
|
— | — |
121,500,000
GBP
|
— | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
166,000,000
GBP
|
— | — |
142,600,000
GBP
|
— | — | — | — | — | — | — | — |