Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||
| Profit (loss) |
–
GBP
|
6,500,000
GBP
|
— |
6,500,000
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
8,400,000
GBP
|
–
GBP
|
8,400,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
8,700,000
GBP
|
— | — | — | — | — | — | — |
10,600,000
GBP
|
— | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
700,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
500,000
GBP
|
— | — | — | — | — | — | — |
1,800,000
GBP
|
— | — | — |
| Cash flows from (used in) investing activities | — |
200,000
GBP
|
— | — | — | — | — | — | — |
1,800,000
GBP
|
— | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||
| Proceeds from issuing shares | — |
–
GBP
|
— | — | — | — | — | — | — |
200,000
GBP
|
— | — | — |
| Repayments of borrowings, classified as financing activities | — |
5,000,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — |
| Payments of lease liabilities, classified as financing activities | — |
2,900,000
GBP
|
— | — | — | — | — | — | — |
2,100,000
GBP
|
— | — | — |
| Dividends paid, classified as financing activities | — |
2,500,000
GBP
|
— | — | — | — | — | — | — |
2,300,000
GBP
|
— | — | — |
| Interest paid, classified as financing activities | — |
1,000,000
GBP
|
— | — | — | — | — | — | — |
500,000
GBP
|
— | — | — |
| Cash flows from (used in) financing activities | — |
2,100,000
GBP
|
— | — | — | — | — | — | — |
6,600,000
GBP
|
— | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
6,800,000
GBP
|
— | — | — | — | — | — | — |
2,200,000
GBP
|
— | — | — |
| Cash and cash equivalents | — | — |
29,300,000
GBP
|
— | — | — |
22,500,000
GBP
|
— | — | — | — | — |
20,300,000
GBP
|