Statement Of Financial Position [Abstract]
| Concept |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2022-04-02 |
As at 2022-04-02 |
As at 2022-04-02 |
As at 2022-04-02 |
As at 2022-04-02 |
As at 2022-04-02 |
As at 2022-04-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | — |
406,000,000
GBP
|
— |
376,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — | — | — |
1,013,000,000
GBP
|
— |
950,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners | — | — | — | — | — | — |
12,000,000
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets | — | — | — | — | — | — |
122,000,000
GBP
|
— |
76,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — | — | — |
208,000,000
GBP
|
— |
197,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — | — |
441,000,000
GBP
|
— |
1 ,026
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — | — |
3,370,000,000
GBP
|
— |
3,686,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||
| Issued capital | — | — | — | — | — | — |
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — | — |
675,000,000
GBP
|
— |
1, 026
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — | — | — |
231,000,000
GBP
|
— |
230,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — | — | — | — |
1,147,000,000
GBP
|
— |
1,533,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — | — | — | — |
7,000,000
GBP
|
— |
6,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
–
GBP
|
23 1
GBP
|
241,000,000
GBP
|
1,147,000,000
GBP
|
7,000,000
GBP
|
675,000,000
GBP
|
1,154,000,000
GBP
|
–
GBP
|
1,539,000,000
GBP
|
1,026,000,000
GBP
|
230,000,000
GBP
|
277,000,000
GBP
|
1,533,000,000
GBP
|
6,000,000
GBP
|
1,123,000,000
GBP
|
227,000,000
GBP
|
–
GBP
|
1,617,000,000
GBP
|
263,000,000
GBP
|
1,613,000,000
GBP
|
4,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||
| Current tax liabilities | — | — | — | — | — | — |
86,000,000
GBP
|
— |
43,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — | — | — | — |
1,000,000
GBP
|
— |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — | — |
2,216,000,000
GBP
|
— |
2,147,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |