Statement Of Cash Flows [Abstract]
| Concept |
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 |
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 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||
| Profit (loss) | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
5 8. 8
GBP
|
–
GBP
|
5 8 .8
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
45,500,000
GBP
|
45,500,000
GBP
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||||
| Adjustments for finance costs | — | — | — | — | — |
2 .1
GBP
|
— | — | — | — | — | — | — | — |
3,300,000
GBP
|
— | — |
| Adjustments for decrease (increase) in inventories | — | — | — | — | — |
10. 2
GBP
|
— | — | — | — | — | — | — | — |
200,000
GBP
|
— | — |
| Adjustments for depreciation and amortisation expense | — | — | — | — | — |
16 . 5
GBP
|
— | — | — | — | — | — | — | — |
16,400,000
GBP
|
— | — |
| Adjustments for provisions | — | — | — | — | — |
4 .1
GBP
|
— | — | — | — | — | — | — | — |
6,400,000
GBP
|
— | — |
| Adjustments for share-based payments | — | — | — | — | — |
3. 4
GBP
|
— | — | — | — | — | — | — | — |
2,500,000
GBP
|
— | — |
| Other adjustments for non-cash items | — | — | — | — | — |
0 . 8
GBP
|
— | — | — | — | — | — | — | — |
–
GBP
|
— | — |
| Adjustments for losses (gains) on disposal of non-current assets | — | — | — | — | — |
0 .4
GBP
|
— | — | — | — | — | — | — | — |
1,500,000
GBP
|
— | — |
| Cash flows from (used in) operations | — | — | — | — | — |
8 9.0
GBP
|
— | — | — | — | — | — | — | — |
80,600,000
GBP
|
— | — |
| Interest paid, classified as operating activities | — | — | — | — | — |
2 . 4
GBP
|
— | — | — | — | — | — | — | — |
2,800,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — | — | — | — | — |
11 . 0
GBP
|
— | — | — | — | — | — | — | — |
9,600,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — | — | — | — | — |
75. 6
GBP
|
— | — | — | — | — | — | — | — |
68,200,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — | — | — | — |
0. 4
GBP
|
— | — | — | — | — | — | — | — |
200,000
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — | — |
4 2 .1
GBP
|
— | — | — | — | — | — | — | — |
33,000,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — | — | — | — | — |
2 .0
GBP
|
— | — | — | — | — | — | — | — |
1,600,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — | — | — | — | — |
41 . 2
GBP
|
— | — | — | — | — | — | — | — |
20,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||
| Payments to acquire or redeem entity's shares | — | — | — | — | — |
4 0. 3
GBP
|
— | — | — | — | — | — | — | — |
–
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities | — | — | — | — | — |
4 0.0
GBP
|
— | — | — | — | — | — | — | — |
5,000,000
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — |
20,000,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — | — | — | — | — |
5. 3
GBP
|
— | — | — | — | — | — | — | — |
5,300,000
GBP
|
— | — |
| Dividends paid, classified as financing activities | — | — | — | — | — |
24,200,000
GBP
|
— | — | — | — | — | — | — | — |
13,700,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — | — | — | — | — |
41 . 6
GBP
|
— | — | — | — | — | — | — | — |
38,200,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — | — | — | — |
7. 2
GBP
|
— | — | — | — | — | — | — | — |
10,000,000
GBP
|
— | — |
| Cash and cash equivalents |
3 4. 3
GBP
|
— | — | — | — | — | — | — |
41,500,000
GBP
|
— | — | — | — | — | — | — |
31,500,000
GBP
|