Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||||||||
| Property, plant and equipment |
39,000,000
GBP
|
— | — | — | — | — | — | — | — |
49,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
55,200,000
GBP
|
— | — | — | — | — | — | — | — |
73. 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables |
1 4 .1
GBP
|
— | — | — | — | — | — | — | — |
22 .6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
1. 8
GBP
|
— | — | — | — | — | — | — | — |
4 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
18 0 . 8
GBP
|
— | — | — | — | — | — | — | — |
225,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||||||||
| Current inventories |
14 . 8
GBP
|
— | — | — | — | — | — | — | — |
19 . 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables |
14 7. 6
GBP
|
— | — | — | — | — | — | — | — |
10 9 . 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other current financial assets |
7 5 .7
GBP
|
— | — | — | — | — | — | — | — |
50,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
6 03 .1
GBP
|
— | — | — | — | — | — | — | — |
9 4 9 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1, 2 90 . 9
GBP
|
— | — | — | — | — |
| Current assets |
8 41. 2
GBP
|
— | — | — | — | — | — | — | — |
1 ,12 8 . 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
1 ,022.0
GBP
|
— | — | — | — | — | — | — | — |
1, 3 5 3 . 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||
| Issued capital |
8 .1
GBP
|
— | — | — | — | — | — | — | — |
9,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
9 0 7. 5
GBP
|
— | — | — | — | — | — | — | — |
604 .5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Treasury shares |
51. 5
GBP
|
— | — | — | — | — | — | — | — |
6 6.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
1. 2
GBP
|
— | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
508,800,000
GBP
|
9 0 7. 5
GBP
|
1. 2
GBP
|
—
GBP
|
8 .1
GBP
|
13 . 2
GBP
|
51. 5
GBP
|
1, 2 8 8 . 5
GBP
|
18 3 . 2
GBP
|
8 0 4 .1
GBP
|
—
GBP
|
—
GBP
|
18 3 .2
GBP
|
60 4.5
GBP
|
66 . 0
GBP
|
9,300,000
GBP
|
6 .4
GBP
|
1 ,2 88.5
GBP
|
—
GBP
|
1, 4 0 8 .7
GBP
|
—
GBP
|
1, 0 7 3 .7
GBP
|
1 ,288.5
GBP
|
1 ,01 3.0
GBP
|
18 3 .2
GBP
|
11 . 6
GBP
|
9,300,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||||||||
| Non-current provisions |
6 9 .1
GBP
|
— | — | — | — | — | — | — | — |
14 3 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
11 2 . 7
GBP
|
— | — | — | — | — | — | — | — |
2 0 4 .7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||||||||
| Current provisions |
5 8.1
GBP
|
— | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
3 26 .4
GBP
|
— | — | — | — | — | — | — | — |
3 32 . 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
4 0 0 .5
GBP
|
— | — | — | — | — | — | — | — |
3 45 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
5 13 . 2
GBP
|
— | — | — | — | — | — | — | — |
549,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |