Statement Of Cash Flows [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations | — |
89,061,000
GBP
|
— |
59,582,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — |
12,150,000
GBP
|
— |
10,678,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
76,911,000
GBP
|
— |
48,904,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Purchase of property, plant and equipment, classified as investing activities | — |
1,158,000
GBP
|
— |
925,000
GBP
|
— |
| Proceeds from sales of other long-term assets, classified as investing activities | — |
—
GBP
|
— |
3,000
GBP
|
— |
| Interest received, classified as investing activities | — |
1,544,000
GBP
|
— |
56,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
41,354,000
GBP
|
— |
866,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing other equity instruments | — |
136 ,680
GBP
|
— |
7 ,038
GBP
|
— |
| Interest paid, classified as financing activities | — |
122,000
GBP
|
— |
—
GBP
|
— |
| Cash flows from (used in) financing activities | — |
162,978,000
GBP
|
— |
5,035,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
44 ,713
GBP
|
— |
44,735,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
3,176,000
GBP
|
— |
83,000
GBP
|
— |
| Cash and cash equivalents |
88,442,000
GBP
|
— |
40,553,000
GBP
|
— |
85,371,000
GBP
|