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] | |||||
| Profit (loss) | — |
972,600,000
GBP
|
— |
449,400,000
GBP
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||
| Adjustments for income tax expense | — |
1,500,000
GBP
|
— |
100,000
GBP
|
— |
| Adjustments for finance costs | — |
40,100,000
GBP
|
— |
37,600,000
GBP
|
— |
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — |
2,900,000
GBP
|
— |
400,000
GBP
|
— |
| Adjustments for share-based payments | — |
5,500,000
GBP
|
— |
5,900,000
GBP
|
— |
| Cash flows from (used in) operations | — |
192,100,000
GBP
|
— |
154,400,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — |
4,000,000
GBP
|
— |
16,800,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
196,100,000
GBP
|
— |
137,600,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Other cash payments to acquire interests in joint ventures, classified as investing activities | — |
500,000
GBP
|
— |
700,000
GBP
|
— |
| Interest received, classified as investing activities | — |
–
GBP
|
— |
100,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
327,300,000
GBP
|
— |
150,200,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from borrowings, classified as financing activities | — |
245,500,000
GBP
|
— |
289,500,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
245,500,000
GBP
|
— |
339,500,000
GBP
|
— |
| Dividends paid, classified as financing activities | — |
114,300,000
GBP
|
— |
109,600,000
GBP
|
— |
| Interest paid, classified as financing activities | — |
37,500,000
GBP
|
— |
35,500,000
GBP
|
— |
| Cash flows from (used in) financing activities | — |
144,500,000
GBP
|
— |
49,000,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
13,300,000
GBP
|
— |
36,400,000
GBP
|
— |
| Cash and cash equivalents |
70,900,000
GBP
|
— |
57,600,000
GBP
|
— |
21,200,000
GBP
|