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 |
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 |
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) |
–
GBP
|
86,800,000
GBP
|
— |
8 5.6
GBP
|
–
GBP
|
1,200,000
GBP
|
8 5.6
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
74 . 3
GBP
|
7 3.7
GBP
|
0. 6
GBP
|
73 .7
GBP
|
–
GBP
|
–
GBP
|
— |
| Cash flows from (used in) operating activities | — |
191,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
14 2 . 9
GBP
|
— | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||||
| Purchase of property, plant and equipment, classified as investing activities | — |
74. 1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
57,200,000
GBP
|
— | — | — | — | — | — |
| Purchase of intangible assets, classified as investing activities | — |
8. 3
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
9,800,000
GBP
|
— | — | — | — | — | — |
| Interest received, classified as investing activities | — |
800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — |
| Cash flows from (used in) investing activities | — |
71,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
6 1 .9
GBP
|
— | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||||
| Payments to acquire or redeem entity's shares | — |
13 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — |
| Proceeds from borrowings, classified as financing activities | — |
25. 7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
50. 7
GBP
|
— | — | — | — | — | — |
| Repayments of borrowings, classified as financing activities | — |
61,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
75. 0
GBP
|
— | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities | — |
13,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
13. 8
GBP
|
— | — | — | — | — | — |
| Dividends paid, classified as financing activities | — |
4 0 .6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3 8.5
GBP
|
— | — | — | — | — | — |
| Interest paid, classified as financing activities | — |
7,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
6,200,000
GBP
|
— | — | — | — | — | — |
| Cash flows from (used in) financing activities | — |
110 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
82,800,000
GBP
|
— | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
10 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1. 8
GBP
|
— | — | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
1. 7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
0. 1
GBP
|
— | — | — | — | — | — |
| Cash and cash equivalents | — | — |
44. 7
GBP
|
— | — | — | — | — | — | — |
36,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
37 .9
GBP
|