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 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operating activities | — |
70 0 .9
GBP
|
— |
2 , 0 2 9. 0
GBP
|
2,0 50.6
GBP
|
| Cash flows from (used in) investing activities [abstract] | |||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
12 .9
GBP
|
— |
8,700,000
GBP
|
11 .2
GBP
|
| Purchase of property, plant and equipment, classified as investing activities | — |
2 0 8 . 4
GBP
|
— |
2 63 . 2
GBP
|
218 .3
GBP
|
| Purchase of intangible assets, classified as investing activities | — |
1 4 .9
GBP
|
— |
2 9.9
GBP
|
54,400,000
GBP
|
| Cash flows from (used in) investing activities | — |
4 0 8 .9
GBP
|
— |
6 38 . 4
GBP
|
16 3 . 4
GBP
|
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from changes in ownership interests in subsidiaries that do not result in loss of control | — |
–
GBP
|
— |
3 9. 5
GBP
|
–
GBP
|
| Payments from changes in ownership interests in subsidiaries that do not result in loss of control | — |
84 .2
GBP
|
— |
13 5.0
GBP
|
80,600,000
GBP
|
| Payments to acquire or redeem entity's shares | — |
862 . 7
GBP
|
— |
818 . 5
GBP
|
290. 2
GBP
|
| Repayments of borrowings, classified as financing activities | — |
220,600,000
GBP
|
— |
3 9 7. 1
GBP
|
2 82. 7
GBP
|
| Payments of lease liabilities, classified as financing activities | — |
309 .6
GBP
|
— |
320. 7
GBP
|
3 0 0 .1
GBP
|
| Cash flows from (used in) financing activities | — |
1,9 1 1 .0
GBP
|
— |
2 , 0 5 7.0
GBP
|
2 50.5
GBP
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
1,6 19 .0
GBP
|
— |
666,400,000
GBP
|
1 ,636.7
GBP
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
64,200,000
GBP
|
— |
1 3 0.1
GBP
|
9 9. 2
GBP
|
| Cash and cash equivalents |
2 , 491 . 5
GBP
|
— |
3 , 8 8 2 .9
GBP
|
— | — |