Statement Of Changes In Equity [Abstract]
| Concept |
As at 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
As at 2021-12-26 |
2020-12-28 to 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 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
As at 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 2020-12-27 |
2019-12-30 to 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 changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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
|
0. 5
GBP
|
5 8 .6
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
|
36,700,000
GBP
|
4 .1
GBP
|
32 .1
GBP
|
5 7. 6
GBP
|
0. 5
GBP
|
4. 5
GBP
|
5 . 5
GBP
|
1 1 .7
GBP
|
4 3 . 8
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
–
GBP
|
–
GBP
|
78,300,000
GBP
|
–
GBP
|
78,300,000
GBP
|
1 5 .1
GBP
|
— |
93,400,000
GBP
|
— | — | — | — | — | — | — | — |
78,300,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — |
41 .1
GBP
|
–
GBP
|
1. 4
GBP
|
4 1 .1
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
84,300,000
GBP
|
3 9.7
GBP
|
4 4 .6
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — |
–
GBP
|
–
GBP
|
8,700,000
GBP
|
–
GBP
|
8,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
8 .7
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
400,000
GBP
|
5 .6
GBP
|
–
GBP
|
–
GBP
|
5,600,000
GBP
|
–
GBP
|
— |
5 . 2
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
–
GBP
|
–
GBP
|
8 7. 0
GBP
|
–
GBP
|
8 7. 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
78,300,000
GBP
|
–
GBP
|
–
GBP
|
8 .7
GBP
|
–
GBP
|
— | — | — | — |
41 .1
GBP
|
–
GBP
|
1 .0
GBP
|
35,500,000
GBP
|
–
GBP
|
–
GBP
|
5. 6
GBP
|
–
GBP
|
— |
34,500,000
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — |
–
GBP
|
–
GBP
|
400,000
GBP
|
0. 4
GBP
|
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
13,500,000
GBP
|
–
GBP
|
12,900,000
GBP
|
–
GBP
|
600,000
GBP
|
— |
13,500,000
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
–
GBP
|
–
GBP
|
56. 0
GBP
|
–
GBP
|
56,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
56. 0
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — |
25 .6
GBP
|
–
GBP
|
–
GBP
|
25 .6
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
25 .6
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
–
GBP
|
–
GBP
|
1,700,000
GBP
|
–
GBP
|
1,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1 .7
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — |
1,400,000
GBP
|
–
GBP
|
–
GBP
|
1,400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
1,400,000
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |