Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2021-12-26 |
As at 2021-12-26 |
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As at 2021-12-26 |
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As at 2021-12-26 |
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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 |
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As at 2019-12-29 |
As at 2019-12-29 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | ||||||||||||||||||||||||||||||
| Assets | — | — | — | — |
52 2 .0
GBP
|
— | — | — | — | — | — | — | — | — |
592 .2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | ||||||||||||||||||||||||||||||
| Liabilities | — | — | — | — |
5 8 0. 6
GBP
|
— | — | — | — | — | — | — | — | — |
60 1 .0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of 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
|
1 1 .7
GBP
|
32 .1
GBP
|
4 3 . 8
GBP
|
5 7. 6
GBP
|
5 . 5
GBP
|
0. 5
GBP
|
4. 5
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |