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 |
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 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||
| Profit (loss) | — |
–
GBP
|
561 . 0
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
561 .0
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
7 87. 2
GBP
|
7 87. 2
GBP
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||
| Adjustments for income tax expense | — | — |
1 6 9.7
GBP
|
— | — | — | — | — | — | — | — | — |
179,600,000
GBP
|
— | — |
| Adjustments for finance costs | — | — |
4 .1
GBP
|
— | — | — | — | — | — | — | — | — |
3,600,000
GBP
|
— | — |
| Adjustments for decrease (increase) in inventories | — | — |
5 32. 5
GBP
|
— | — | — | — | — | — | — | — | — |
9. 8
GBP
|
— | — |
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — | — |
6,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
6,200,000
GBP
|
— | — |
| Adjustments for provisions | — | — |
275 .0
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
— | — |
| Adjustments for share-based payments | — | — |
9,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
6,400,000
GBP
|
— | — |
| Other adjustments for non-cash items | — | — |
7. 9
GBP
|
— | — | — | — | — | — | — | — | — |
7. 9
GBP
|
— | — |
| Cash flows from (used in) operations | — | — |
566. 3
GBP
|
— | — | — | — | — | — | — | — | — |
97 2. 8
GBP
|
— | — |
| Interest paid, classified as operating activities | — | — |
3,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
3,700,000
GBP
|
— | — |
| Interest received, classified as operating activities | — | — |
3,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,900,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — | — |
1 64 . 2
GBP
|
— | — | — | — | — | — | — | — | — |
186,200,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — | — |
402 . 3
GBP
|
— | — | — | — | — | — | — | — | — |
784 .8
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — | — |
0. 2
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — |
900,000
GBP
|
— | — | — | — | — | — | — | — | — |
0. 9
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — |
30,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
20,900,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — | — |
29,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
1 8 . 2
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||
| Payments to acquire or redeem entity's shares | — | — |
0 .7
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — | — |
3,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
3 .3
GBP
|
— | — |
| Dividends paid, classified as financing activities | — | — |
75 0 .1
GBP
|
— | — | — | — | — | — | — | — | — |
7 49.6
GBP
|
— | — |
| Cash flows from (used in) financing activities | — | — |
757 .5
GBP
|
— | — | — | — | — | — | — | — | — |
75 4.1
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — |
3 85.0
GBP
|
— | — | — | — | — | — | — | — | — |
1 2.5
GBP
|
— | — |
| Cash and cash equivalents |
8 61 .6
GBP
|
— | — | — | — | — | — |
1 , 24 6 . 6
GBP
|
— | — | — | — | — | — |
1 , 2 3 4.1
GBP
|