Analysis Of Income And Expense [Abstract]
| Concept |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||
| Revenue [abstract] | ||||||||||||||
| Other revenue | — | — | — | — | — |
502,900,000
GBP
|
— | — | — | — | — |
298,000,000
GBP
|
— | — |
| Revenue | — | — | — | — | — |
581,100,000
GBP
|
— | — | — | — | — |
377,200,000
GBP
|
— | — |
| Material income and expense [abstract] | ||||||||||||||
| Gains (losses) on disposals of non-current assets [abstract] | ||||||||||||||
| Gains (losses) on disposals of non-current assets | — | — | — | — | — |
100,000
GBP
|
— | — | — | — | — |
400,000
GBP
|
— | — |
| Gains (losses) on disposals of property, plant and equipment [abstract] | ||||||||||||||
| Gains (losses) on disposals of property, plant and equipment | — | — | — | — | — |
–
GBP
|
— | — | — | — | — |
7,200,000
GBP
|
— | — |
| Investment income | — | — | — | — | — |
1,500,000
GBP
|
— | — | — | — | — |
300,000
GBP
|
— | — |
| Selling, general and administrative expense [abstract] | ||||||||||||||
| Selling, general and administrative expense | — | — | — | — | — |
216,900,000
GBP
|
— | — | — | — | — |
212,100,000
GBP
|
— | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||
| Comprehensive income |
2,500,000
GBP
|
–
GBP
|
–
GBP
|
273,500,000
GBP
|
–
GBP
|
287,300,000
GBP
|
11,300,000
GBP
|
–
GBP
|
–
GBP
|
8,100,000
GBP
|
1,200,000
GBP
|
31,300,000
GBP
|
24,400,000
GBP
|
–
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — |
287,300,000
GBP
|
— | — | — | — | — |
31,300,000
GBP
|
— | — |