Statement Of Cash Flows [Abstract]
| Concept |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
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 |
2021-01-01 to 2021-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||||
| Profit (loss) |
270,100,000
GBP
|
383,200,000
GBP
|
— |
–
GBP
|
–
GBP
|
653,300,000
GBP
|
–
GBP
|
649,300,000
GBP
|
4,000,000
GBP
|
2,000,000
GBP
|
— |
28,000,000
GBP
|
320,800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
322,800,000
GBP
|
350,800,000
GBP
|
| Cash flows from (used in) operations | — | — | — | — | — |
462,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
479,000,000
GBP
|
— |
| Interest paid, classified as operating activities | — | — | — | — | — |
23,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
19,800,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — | — | — | — | — |
130,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
111,500,000
GBP
|
— |
| Cash flows from (used in) operating activities | — | — | — | — | — |
308,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
347,700,000
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
|
— | — | — | — | — | — | — | — | — | — |
48,900,000
GBP
|
— |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — | — | — | — |
1,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
200,000
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — | — |
141,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
153,000,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — | — | — | — | — |
11,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
5,700,000
GBP
|
— |
| Proceeds from government grants, classified as investing activities | — | — | — | — | — |
6,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
| Interest received, classified as investing activities | — | — | — | — | — |
5,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,500,000
GBP
|
— |
| Cash flows from (used in) investing activities | — | — | — | — | — |
424,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
216,200,000
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 | — | — | — | — | — |
1,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
700,000
GBP
|
— |
| Proceeds from borrowings, classified as financing activities | — | — | — | — | — |
232,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
320,200,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — | — | — | — | — |
614,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
282,600,000
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — | — | — | — | — |
17,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
14,400,000
GBP
|
— |
| Cash flows from (used in) financing activities | — | — | — | — | — |
552,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
112,600,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — | — | — |
180,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
18,900,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — | — | — |
6,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
2,400,000
GBP
|
— |
| Cash and cash equivalents | — | — |
320,600,000
GBP
|
— | — | — | — | — | — | — |
112,800,000
GBP
|
— | — | — | — | — | — | — |