Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-10-01 |
As at 2022-10-01 |
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As at 2022-10-01 |
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As at 2021-10-02 |
As at 2021-10-02 |
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As at 2021-10-02 |
As at 2021-10-02 |
As at 2021-10-02 |
As at 2021-10-02 |
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As at 2020-10-03 |
As at 2020-10-03 |
As at 2020-10-03 |
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As at 2020-10-03 |
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As at 2020-10-03 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 |
417,100,000
GBP
|
50,700,000
GBP
|
6,800,000
GBP
|
334,000,000
GBP
|
48,700,000
GBP
|
110,900,000
GBP
|
3,100,000
GBP
|
648,100,000
GBP
|
–
GBP
|
48,700,000
GBP
|
406,400,000
GBP
|
111,100,000
GBP
|
81,400,000
GBP
|
151,100,000
GBP
|
334,000,000
GBP
|
6,800,000
GBP
|
360,500,000
GBP
|
108,700,000
GBP
|
111,900,000
GBP
|
248,900,000
GBP
|
374,300,000
GBP
|
430,600,000
GBP
|
334,000,000
GBP
|
6,800,000
GBP
|
23,700,000
GBP
|
48,700,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |