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 2 . 9
GBP
|
— |
14 4 . 3
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
–
GBP
|
— |
66 .0
GBP
|
— |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
4 .7
GBP
|
— |
11 . 7
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
5 7. 2
GBP
|
— |
4 5 .1
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — |
9,800,000
GBP
|
— |
6,900,000
GBP
|
— |
| Interest received, classified as investing activities | — |
400,000
GBP
|
— |
0. 3
GBP
|
— |
| Cash flows from (used in) investing activities | — |
61,900,000
GBP
|
— |
10 4 . 5
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from borrowings, classified as financing activities | — |
50 .7
GBP
|
— |
15 5 . 5
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
75. 0
GBP
|
— |
1 16.9
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — |
13 . 8
GBP
|
— |
14. 4
GBP
|
— |
| Dividends paid, classified as financing activities | — |
38,500,000
GBP
|
— |
4 9.0
GBP
|
— |
| Interest paid, classified as financing activities | — |
6. 2
GBP
|
— |
5,500,000
GBP
|
— |
| Cash flows from (used in) financing activities | — |
8 2. 8
GBP
|
— |
30. 3
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
1. 8
GBP
|
— |
9 .5
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
0 .1
GBP
|
— |
0. 8
GBP
|
— |
| Cash and cash equivalents |
36. 2
GBP
|
— |
3 7. 9
GBP
|
— |
2 9. 2
GBP
|