Statement Of Cash Flows [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||||
| Profit (loss) | — |
–
GBP
|
–
GBP
|
4 01 . 5
GBP
|
–
GBP
|
–
GBP
|
401 . 5
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
34 6.9
GBP
|
346 .9
GBP
|
| Cash flows from (used in) operations | — | — | — |
166. 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
191,600,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — | — | — |
46,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
32 .2
GBP
|
— |
| Cash flows from (used in) operating activities | — | — | — |
120,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
159,400,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — | — | — |
36 5.4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
333,700,000
GBP
|
— |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — | — | — |
11 4 .7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
135 . 5
GBP
|
— |
| Other cash receipts from sales of equity or debt instruments of other entities, classified as investing activities | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
38. 3
GBP
|
— |
| Interest received, classified as investing activities | — | — | — |
1,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
0. 5
GBP
|
— |
| Cash flows from (used in) investing activities | — | — | — |
218. 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
201. 8
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||||
| Payments to acquire or redeem entity's shares | — | — | — |
1 91.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
201. 3
GBP
|
— |
| Proceeds from borrowings, classified as financing activities | — | — | — |
326 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
70,000,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — | — | — |
326 .8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
169. 8
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — | — | — |
13 .9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
13,000,000
GBP
|
— |
| Dividends paid, classified as financing activities | — | — | — |
78. 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
7 9.0
GBP
|
— |
| Cash flows from (used in) financing activities | — | — | — |
2 8 7. 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
398 .0
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — |
50. 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
36 .8
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — |
9,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
6 . 3
GBP
|
— |
| Cash and cash equivalents |
228 .1
GBP
|
— | — | — | — | — | — | — | — |
1 6 7. 8
GBP
|
— | — | — | — | — | — | — | — |