Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 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] | |||||
| Income taxes paid (refund), classified as operating activities |
16,132,000
GBP
|
— | — |
12,150,000
GBP
|
— |
| Cash flows from (used in) operating activities |
57 ,124
GBP
|
— | — |
76,911,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Purchase of property, plant and equipment, classified as investing activities |
1,105,000
GBP
|
— | — |
1,158,000
GBP
|
— |
| Interest received, classified as investing activities |
3,6 76
GBP
|
— | — |
1,544,000
GBP
|
— |
| Cash flows from (used in) investing activities |
7 ,882
GBP
|
— | — |
41,354,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing other equity instruments |
—
GBP
|
— | — |
136,680,000
GBP
|
— |
| Interest paid, classified as financing activities |
81,000
GBP
|
— | — |
122,000
GBP
|
— |
| Cash flows from (used in) financing activities |
2 ,091
GBP
|
— | — |
162,978,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
51,333,000
GBP
|
— | — |
44 ,713
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents |
632,000
GBP
|
— | — |
3,176,000
GBP
|
— |
| Cash and cash equivalents | — |
36,4 77
GBP
|
88,442,000
GBP
|
— |
40,55 3
GBP
|