Statement Of Financial Position [Abstract]
| Concept |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2021-12-26 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
As at 2019-12-29 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — |
90. 3
GBP
|
— | — | — | — | — | — | — | — | — |
91. 1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — |
19,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
2 0 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method | — | — | — | — |
52 .7
GBP
|
— | — | — | — | — | — | — | — | — |
39. 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets | — | — | — | — |
200,000
GBP
|
— | — | — | — | — | — | — | — | — |
3,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — |
42 .8
GBP
|
— | — | — | — | — | — | — | — | — |
63,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — |
52 2 .0
GBP
|
— | — | — | — | — | — | — | — | — |
592 .2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||
| Issued capital | — | — | — | — |
2,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — |
1 0 5 . 4
GBP
|
— | — | — | — | — | — | — | — | — |
4 8 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — |
49,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
49. 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
4 . 6
GBP
|
2,300,000
GBP
|
1 0 5 . 4
GBP
|
1 . 0
GBP
|
5 8 .6
GBP
|
4 9.6
GBP
|
–
GBP
|
5 8 .6
GBP
|
0. 5
GBP
|
–
GBP
|
–
GBP
|
8 .8
GBP
|
3,400,000
GBP
|
–
GBP
|
8 . 8
GBP
|
4 9.6
GBP
|
2 .4
GBP
|
4 8 . 2
GBP
|
9. 7
GBP
|
500,000
GBP
|
2 .4
GBP
|
4 .1
GBP
|
36,700,000
GBP
|
1 1 .7
GBP
|
32 .1
GBP
|
4 3 . 8
GBP
|
5 7. 6
GBP
|
5 . 5
GBP
|
0. 5
GBP
|
4. 5
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||
| Liabilities included in disposal groups classified as held for sale | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
23 . 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — |
5 8 0. 6
GBP
|
— | — | — | — | — | — | — | — | — |
60 1 .0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |