Statement Of Cash Flows [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||
| Profit (loss) |
11 8 .1
GBP
|
96,300,000
GBP
|
21 . 8
GBP
|
— |
1 1 4 .7
GBP
|
105,600,000
GBP
|
9. 1
GBP
|
— | — |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||
| Adjustments for income tax expense | — |
2 9.1
GBP
|
— | — | — |
28. 8
GBP
|
— | — | — |
| Adjustments for finance costs | — |
25,400,000
GBP
|
— | — | — |
13 . 9
GBP
|
— | — | — |
| Adjustments for decrease (increase) in inventories | — |
8 . 4
GBP
|
— | — | — |
24 . 6
GBP
|
— | — | — |
| Adjustments for provisions | — |
3 .1
GBP
|
— | — | — |
8,300,000
GBP
|
— | — | — |
| Adjustments for share-based payments | — |
3,300,000
GBP
|
— | — | — |
3,000,000
GBP
|
— | — | — |
| Cash flows from (used in) operations | — |
243 . 3
GBP
|
— | — | — |
230,900,000
GBP
|
— | — | — |
| Interest paid, classified as operating activities | — |
1 5 . 9
GBP
|
— | — | — |
6. 8
GBP
|
— | — | — |
| Interest received, classified as operating activities | — |
1,200,000
GBP
|
— | — | — |
2,600,000
GBP
|
— | — | — |
| Income taxes paid (refund), classified as operating activities | — |
2 4 . 0
GBP
|
— | — | — |
32. 5
GBP
|
— | — | — |
| Cash flows from (used in) operating activities | — |
201 .7
GBP
|
— | — | — |
191 . 9
GBP
|
— | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
173,600,000
GBP
|
— | — | — |
1 8 . 8
GBP
|
— | — | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
5 .7
GBP
|
— | — | — |
3,400,000
GBP
|
— | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
13 1 . 3
GBP
|
— | — | — |
1 0 6 . 8
GBP
|
— | — | — |
| Cash flows from (used in) investing activities | — |
29 6 . 2
GBP
|
— | — | — |
1 2 0 . 4
GBP
|
— | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||
| Proceeds from issuing shares | — |
1,300,000
GBP
|
— | — | — |
0 .7
GBP
|
— | — | — |
| Proceeds from borrowings, classified as financing activities | — |
3 5 7. 4
GBP
|
— | — | — |
–
GBP
|
— | — | — |
| Repayments of borrowings, classified as financing activities | — |
304 .0
GBP
|
— | — | — |
0 . 9
GBP
|
— | — | — |
| Payments of lease liabilities, classified as financing activities | — |
9 . 4
GBP
|
— | — | — |
8 .1
GBP
|
— | — | — |
| Dividends paid, classified as financing activities | — |
4 8 . 3
GBP
|
— | — | — |
3 7. 6
GBP
|
— | — | — |
| Cash flows from (used in) financing activities | — |
3,000,000
GBP
|
— | — | — |
4 6 . 6
GBP
|
— | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
9 7. 5
GBP
|
— | — | — |
24 . 9
GBP
|
— | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
0 . 5
GBP
|
— | — | — |
0. 3
GBP
|
— | — | — |
| Cash and cash equivalents | — | — | — |
28. 9
GBP
|
— | — | — |
126,900,000
GBP
|
10 1 .7
GBP
|