Statement Of Cash Flows [Abstract]
| Concept |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||
| Cash flows from (used in) operating activities [abstract] | ||||
| Income taxes paid (refund), classified as operating activities | — |
300,000
GBP
|
200,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
133,600,000
GBP
|
117 .6
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
5,100,000
GBP
|
—
GBP
|
— |
| Interest received, classified as investing activities | — |
—
GBP
|
1,500,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
44,600,000
GBP
|
45,800,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||
| Proceeds from borrowings, classified as financing activities | — |
282,400,000
GBP
|
161,600,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
300,000,000
GBP
|
175,700,000
GBP
|
— |
| Dividends paid, classified as financing activities | — |
89 .5
GBP
|
81,600,000
GBP
|
— |
| Interest paid, classified as financing activities | — |
47 .0
GBP
|
39 .8
GBP
|
— |
| Cash flows from (used in) financing activities | — |
114,900,000
GBP
|
76,800,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
25,900,000
GBP
|
5,000,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||
| Effect of exchange rate changes on cash and cash equivalents | — |
—
GBP
|
700,000
GBP
|
— |
| Cash and cash equivalents |
3,200,000
GBP
|
— | — |
29 .1
GBP
|