Analysis Of Income And Expense [Abstract]
| Concept |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2021-10-03 to 2022-10-01 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
2020-10-04 to 2021-10-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | |||||||||||||||||||||
| Revenue [abstract] | |||||||||||||||||||||
| Revenue | — | — |
799,600,000
GBP
|
— |
–
GBP
|
799,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
— |
401,700,000
GBP
|
— |
401,700,000
GBP
|
— |
| Material income and expense [abstract] | |||||||||||||||||||||
| Finance income (cost) | — | — |
18,000,000
GBP
|
— |
109,000,000
GBP
|
91,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
26,400,000
GBP
|
— |
92,500,000
GBP
|
— |
66,100,000
GBP
|
— |
| Operating expense | — | — |
657,500,000
GBP
|
— |
26,700,000
GBP
|
684,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
96,200,000
GBP
|
— |
396,000,000
GBP
|
— |
492,200,000
GBP
|
— |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | |||||||||||||||||||||
| Share of profit (loss) of associates accounted for using equity method | — | — |
3,300,000
GBP
|
— |
–
GBP
|
3,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
— |
14,500,000
GBP
|
— |
14,500,000
GBP
|
— |
| Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax [abstract] | |||||||||||||||||||||
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, before tax |
–
GBP
|
–
GBP
|
800,000
GBP
|
800,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
— |
| Income tax relating to components of other comprehensive income [abstract] | |||||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — |
20,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
12,300,000
GBP
|
— |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — |
10,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,700,000
GBP
|
— |
| Comprehensive income, continuing and discontinued operations [abstract] | |||||||||||||||||||||
| Comprehensive income |
–
GBP
|
30,700,000
GBP
|
241,400,000
GBP
|
153,900,000
GBP
|
— | — |
–
GBP
|
56,800,000
GBP
|
–
GBP
|
–
GBP
|
177,800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
27,300,000
GBP
|
— |
55,700,000
GBP
|
— |
–
GBP
|
149,400,000
GBP
|
–
GBP
|