Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
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 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||
| Profit (loss) |
48. 0
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
48,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
56,800,000
GBP
|
56,800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
| Cash flows from (used in) operations |
193,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
58,800,000
GBP
|
— | — | — | — | — |
| Income taxes paid (refund), classified as operating activities |
33,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
5,500,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) operating activities |
85,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
900,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
300,000
GBP
|
— | — | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities |
4,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
9,100,000
GBP
|
— | — | — | — | — |
| Purchase of intangible assets, classified as investing activities |
17,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1 4.7
GBP
|
— | — | — | — | — |
| Cash flows from (used in) investing activities |
22,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
23,500,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||
| Payments to acquire or redeem entity's shares |
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — |
| Proceeds from borrowings, classified as financing activities |
48,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
99,300,000
GBP
|
— | — | — | — | — |
| Repayments of borrowings, classified as financing activities |
87,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
43,600,000
GBP
|
— | — | — | — | — |
| Payments of lease liabilities, classified as financing activities |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
9,200,000
GBP
|
— | — | — | — | — |
| Dividends paid, classified as financing activities |
21,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1 8.9
GBP
|
— | — | — | — | — |
| Cash flows from (used in) financing activities |
72,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
27,200,000
GBP
|
— | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
9,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,800,000
GBP
|
— | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents |
1,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
6,200,000
GBP
|
— | — | — | — | — |
| Cash and cash equivalents | — | — |
42,500,000
GBP
|
— | — | — | — | — | — |
50,700,000
GBP
|
— | — | — | — | — | — | — | — |
41,700,000
GBP
|