Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-01-01 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||
| Cash flows from (used in) operating activities [abstract] | ||||||
| Cash flows from (used in) operations |
1 ,111 . 0
GBP
|
— | — |
320,300,000
GBP
|
— | — |
| Interest paid, classified as operating activities |
1 0 6 .1
GBP
|
— | — |
77 .2
GBP
|
— | — |
| Interest received, classified as operating activities |
10 .7
GBP
|
— | — |
3,300,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities |
1 8 0 . 0
GBP
|
— | — |
3 8 .7
GBP
|
— | — |
| Cash flows from (used in) operating activities |
835. 6
GBP
|
— | — |
2 0 7.7
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | ||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities |
9. 0
GBP
|
— | — |
7. 6
GBP
|
— | — |
| Other cash payments to acquire equity or debt instruments of other entities, classified as investing activities |
1. 7
GBP
|
— | — |
–
GBP
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities |
–
GBP
|
— | — |
1. 6
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities |
42 9 . 8
GBP
|
— | — |
1 63.9
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities |
11 . 3
GBP
|
— | — |
10 . 8
GBP
|
— | — |
| Cash flows from (used in) investing activities |
451,800,000
GBP
|
— | — |
18 0 .7
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | ||||||
| Payments from changes in ownership interests in subsidiaries that do not result in loss of control |
–
GBP
|
— | — |
19. 6
GBP
|
— | — |
| Proceeds from issuing shares |
8 .6
GBP
|
— | — |
1. 2
GBP
|
— | — |
| Payments to acquire or redeem entity's shares |
1 4 9 . 2
GBP
|
— | — |
–
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities |
14 0 .0
GBP
|
— | — |
18 8 . 5
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities |
12 5 . 3
GBP
|
— | — |
18 6 . 4
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities |
25 . 8
GBP
|
— | — |
18 . 0
GBP
|
— | — |
| Cash flows from (used in) financing activities |
2 3 7. 9
GBP
|
— | — |
111 . 9
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
145. 9
GBP
|
— | — |
8 4 . 9
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||
| Effect of exchange rate changes on cash and cash equivalents |
4 . 4
GBP
|
— | — |
5,500,000
GBP
|
— | — |
| Cash and cash equivalents | — |
3 79. 5
GBP
|
23 8.0
GBP
|
— |
3 17. 4
GBP
|
3 1 7. 4
GBP
|