Statement Of Financial Position [Abstract]
| Concept |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||||||||||||||
| Property, plant and equipment | — |
1,150,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,011,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investment property | — |
131,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
89,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — |
82,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
100,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets | — |
1,695,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,530,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||||||||||||||
| Current inventories | — |
1,464,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,277,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables | — |
720,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
841,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — |
332,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
336,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
457,000,000
GBP
|
— | — | — | — |
| Current assets | — |
2,597,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,572,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||||||||
| Issued capital | — |
64,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
64,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — |
2,275,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,778,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium | — |
874,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
874,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Treasury shares | — |
644,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
488,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — |
1,618,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,286,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — |
40,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
22,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
874,300,000
GBP
|
1,658,200,000
GBP
|
1,618,200,000
GBP
|
40,000,000
GBP
|
2,275,500,000
GBP
|
47,400,000
GBP
|
64,100,000
GBP
|
33,100,000
GBP
|
644,200,000
GBP
|
66,800,000
GBP
|
965,200,000
GBP
|
1,308,600,000
GBP
|
66,800,000
GBP
|
35,600,000
GBP
|
874,300,000
GBP
|
923,900,000
GBP
|
488,900,000
GBP
|
14,100,000
GBP
|
1,778,100,000
GBP
|
64,100,000
GBP
|
1,286,600,000
GBP
|
22,000,000
GBP
|
874,300,000
GBP
|
66,700,000
GBP
|
18,100,000
GBP
|
64,100,000
GBP
|
28,800,000
GBP
|
967,700,000
GBP
|
1,211,000,000
GBP
|
1,300,000
GBP
|
295,700,000
GBP
|
1,554,500,000
GBP
|
1,192,900,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||||||||||||||
| Non-current provisions | — |
290,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
433,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — |
15,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
40,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — |
1,617,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,806,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||||||||||||||
| Current provisions | — |
16,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
-
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables | — |
711,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
729,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax liabilities, current | — |
102,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
50,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities included in disposal groups classified as held for sale | — |
-
GBP
|
— | — | — | — | — | — | — | — | — |
22,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — |
1,016,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,004,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — |
4,292,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
4,142,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |