Statement Of Financial Position [Abstract]
| Concept |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Property, plant and equipment |
15 2
GBP
|
— | — | — | — | — |
164,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Goodwill |
2,416,000,000
GBP
|
— | — | — | — | — |
1,87 7
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Current tax assets |
39,000,000
GBP
|
— | — | — | — | — |
37,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
19,000,000
GBP
|
— | — | — | — | — |
40,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
489,000,000
GBP
|
— | — | — | — | — |
567,000,000
GBP
|
— | — | — | — | — | — | — | — |
848,000,000
GBP
|
— | — |
| Assets |
3,896,000,000
GBP
|
— | — | — | — | — |
3,329,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital |
12,000,000
GBP
|
— | — | — | — | — |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
570,000,000
GBP
|
— | — | — | — | — |
448,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Share premium |
548,000,000
GBP
|
— | — | — | — | — |
548,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity |
1,397,000,000
GBP
|
12,000,000
GBP
|
206,000,000
GBP
|
570,000,000
GBP
|
61,000,000
GBP
|
548,000,000
GBP
|
1,111,000,000
GBP
|
42,000,000
GBP
|
448,000,000
GBP
|
61,000,000
GBP
|
12,000,000
GBP
|
548,000,000
GBP
|
123,000,000
GBP
|
908,000,000
GBP
|
61,000,000
GBP
|
1,652,000,000
GBP
|
12,000,000
GBP
|
548,000,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Current tax liabilities |
13,000,000
GBP
|
— | — | — | — | — |
31,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
16,000,000
GBP
|
— | — | — | — | — |
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Liabilities included in disposal groups classified as held for sale |
–
GBP
|
— | — | — | — | — |
13,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
2,499,000,000
GBP
|
— | — | — | — | — |
2,218,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |