Statement Of Financial Position [Abstract]
| Concept |
As at 2022-07-31 |
As at 2022-07-31 |
As at 2022-07-31 |
As at 2022-07-31 |
As at 2022-07-31 |
As at 2022-07-31 |
As at 2021-07-31 |
As at 2021-07-31 |
As at 2021-07-31 |
As at 2021-07-31 |
As at 2021-07-31 |
As at 2021-07-31 |
As at 2020-07-31 |
As at 2020-07-31 |
As at 2020-07-31 |
As at 2020-07-31 |
As at 2020-07-31 |
As at 2020-07-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — | — |
34,200,000
GBP
|
— | — | — | — | — | — |
35,700,000
GBP
|
— | — | — | — | — | — |
| Investments accounted for using equity method | — | — | — | — |
9. 3
GBP
|
— | — | — | — | — | — |
15,700,000
GBP
|
— | — | — | — | — | — |
| Deferred tax assets | — | — | — | — |
100,000
GBP
|
— | — | — | — | — | — |
0. 9
GBP
|
— | — | — | — | — | — |
| Other non-current financial assets | — | — | — | — |
20,900,000
GBP
|
— | — | — | — | — | — |
3 9.6
GBP
|
— | — | — | — | — | — |
| Non-current assets | — | — | — | — |
71,600,000
GBP
|
— | — | — | — | — | — |
102. 1
GBP
|
— | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||
| Current inventories | — | — | — | — |
4,423,600,000
GBP
|
— | — | — | — | — | — |
4,032,200,000
GBP
|
— | — | — | — | — | — |
| Trade and other current receivables | — | — | — | — |
114,600,000
GBP
|
— | — | — | — | — | — |
82,200,000
GBP
|
— | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — |
375,300,000
GBP
|
— | — | — | — | — | — |
460,300,000
GBP
|
— | — | — | — | — |
51,400,000
GBP
|
| Current assets | — | — | — | — |
4,913,500,000
GBP
|
— | — | — | — | — | — |
4,574,700,000
GBP
|
— | — | — | — | — | — |
| Assets | — | — | — | — |
4,985,100,000
GBP
|
— | — | — | — | — | — |
4,676,800,000
GBP
|
— | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — | — |
15,400,000
GBP
|
— | — | — | — | — | — |
15,400,000
GBP
|
— | — | — | — | — | — |
| Retained earnings | — | — | — | — |
3, 148.9
GBP
|
— | — | — | — | — | — |
3,071,100,000
GBP
|
— | — | — | — | — | — |
| Share premium | — | — | — | — |
182,000,000
GBP
|
— | — | — | — | — | — |
179,800,000
GBP
|
— | — | — | — | — | — |
| Other reserves | — | — | — | — |
1,500,000
GBP
|
— | — | — | — | — | — |
1,500,000
GBP
|
— | — | — | — | — | — |
| Equity |
182,000,000
GBP
|
15,400,000
GBP
|
3, 148.9
GBP
|
20,000,000
GBP
|
3,367 .8
GBP
|
1,500,000
GBP
|
1,500,000
GBP
|
15,400,000
GBP
|
179,800,000
GBP
|
20,000,000
GBP
|
3,071,100,000
GBP
|
3,287 .8
GBP
|
2,778,700,000
GBP
|
20,000,000
GBP
|
15,400,000
GBP
|
1,500,000
GBP
|
178,400,000
GBP
|
2,994,000,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||
| Non-current provisions | — | — | — | — |
400,800,000
GBP
|
— | — | — | — | — | — |
8 9.0
GBP
|
— | — | — | — | — | — |
| Trade and other non-current payables | — | — | — | — |
106,600,000
GBP
|
— | — | — | — | — | — |
89 .7
GBP
|
— | — | — | — | — | — |
| Deferred tax liabilities | — | — | — | — |
8,900,000
GBP
|
— | — | — | — | — | — |
8,200,000
GBP
|
— | — | — | — | — | — |
| Non-current liabilities | — | — | — | — |
646,300,000
GBP
|
— | — | — | — | — | — |
316,900,000
GBP
|
— | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||
| Current provisions | — | — | — | — |
40,700,000
GBP
|
— | — | — | — | — | — |
2 7. 0
GBP
|
— | — | — | — | — | — |
| Trade and other current payables | — | — | — | — |
930,200,000
GBP
|
— | — | — | — | — | — |
1,041,100,000
GBP
|
— | — | — | — | — | — |
| Current liabilities | — | — | — | — |
971,000,000
GBP
|
— | — | — | — | — | — |
1,072,100,000
GBP
|
— | — | — | — | — | — |
| Liabilities | — | — | — | — |
1,617 .3
GBP
|
— | — | — | — | — | — |
1,389,000,000
GBP
|
— | — | — | — | — | — |