Statement Of Cash Flows [Abstract]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations | — |
4 6 9. 2
GBP
|
— |
333,200,000
GBP
|
— |
| Interest paid, classified as operating activities | — |
4 0 . 6
GBP
|
— |
4 6 .1
GBP
|
— |
| Interest received, classified as operating activities | — |
12 . 2
GBP
|
— |
13 .9
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — |
6 3 . 8
GBP
|
— |
51. 8
GBP
|
— |
| Cash flows from (used in) operating activities | — |
377,000,000
GBP
|
— |
2 4 9. 2
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
76 . 2
GBP
|
— |
7 1. 8
GBP
|
— |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
2 0. 2
GBP
|
— |
3 1 .5
GBP
|
— |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
24,600,000
GBP
|
— |
6 .7
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
4 8 . 5
GBP
|
— |
2 7. 4
GBP
|
— |
| Proceeds from sales of intangible assets, classified as investing activities | — |
–
GBP
|
— |
200,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — |
16 .1
GBP
|
— |
1 4.5
GBP
|
— |
| Cash flows from (used in) investing activities | — |
13 . 2
GBP
|
— |
8,000,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from borrowings, classified as financing activities | — |
–
GBP
|
— |
9 9. 6
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
–
GBP
|
— |
9 9. 6
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — |
5 9. 3
GBP
|
— |
5 7. 4
GBP
|
— |
| Dividends paid, classified as financing activities | — |
5 2 . 2
GBP
|
— |
–
GBP
|
— |
| Cash flows from (used in) financing activities | — |
212,700,000
GBP
|
— |
15 9.9
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
1 7 7. 5
GBP
|
— |
9 7. 3
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
6 5 . 0
GBP
|
— |
200,000
GBP
|
— |
| Cash and cash equivalents |
596. 4
GBP
|
— |
4 81. 2
GBP
|
— |
423,000,000
GBP
|