Statement Of Cash Flows [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations |
33,108,000
GBP
|
— |
61,499,000
GBP
|
— | — |
| Interest received, classified as operating activities |
1,927,000
GBP
|
— |
1,396,000
GBP
|
— | — |
| Cash flows from (used in) operating activities |
29,239,000
GBP
|
— |
50,154,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Purchase of property, plant and equipment, classified as investing activities |
335,000
GBP
|
— |
651,000
GBP
|
— | — |
| Cash flows from (used in) investing activities |
335,000
GBP
|
— |
651,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Dividends paid, classified as financing activities |
31,677,000
GBP
|
— |
39,320,000
GBP
|
— | — |
| Cash flows from (used in) financing activities |
36,335,000
GBP
|
— |
46,954,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents |
793,000
GBP
|
— |
846,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes |
6,638,000
GBP
|
— |
1,703,000
GBP
|
— | — |
| Cash and cash equivalents | — |
40,588,000
GBP
|
— |
47,226,000
GBP
|
45,523,000
GBP
|