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) operating activities | — |
14 4 . 2
GBP
|
— |
17 1. 5
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Purchase of property, plant and equipment, classified as investing activities | — |
3 0 .1
GBP
|
— |
2 1. 4
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — |
50 .3
GBP
|
— |
3 4.6
GBP
|
— |
| Interest received, classified as investing activities | — |
11. 0
GBP
|
— |
500,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
119 . 9
GBP
|
— |
5 8. 4
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares | — |
—
GBP
|
— |
1 ,15 0 . 2
GBP
|
— |
| Payments to acquire or redeem entity's shares | — |
66,000,000
GBP
|
— |
—
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — |
15 . 7
GBP
|
— |
10 . 0
GBP
|
— |
| Interest paid, classified as financing activities | — |
2. 8
GBP
|
— |
1. 2
GBP
|
— |
| Cash flows from (used in) financing activities | — |
8 4.5
GBP
|
— |
1 ,13 9 . 0
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
3 4 8.6
GBP
|
— |
9 0 9 .1
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
6,800,000
GBP
|
— |
2 .7
GBP
|
— |
| Cash and cash equivalents |
9 4 9 .1
GBP
|
— |
1, 2 9 0 . 9
GBP
|
— |
3 7 9 .1
GBP
|