Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
21,100,000
GBP
|
22,600,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
11,400,000
GBP
|
20,300,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
17,900,000
GBP
|
14,300,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
250,000,000
GBP
|
137,600,000
GBP
|
— |
| Categories of current financial assets [abstract] | |||
| Current financial assets at fair value through other comprehensive income [abstract] | |||
| Current financial assets at fair value through other comprehensive income |
3,804,500,000
GBP
|
1,192,400,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
7,679,400,000
GBP
|
6,056,300,000
GBP
|
3,358,600,000
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
7,800,000
GBP
|
90,200,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
256,600,000
GBP
|
5,500,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
29,700,000
GBP
|
15,700,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
11,022,900,000
GBP
|
7,034,200,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
10,200,000
GBP
|
10,200,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
357,800,000
GBP
|
224,500,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
3,200,000
GBP
|
200,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Reserve of share-based payments |
247,400,000
GBP
|
200,500,000
GBP
|
— |
| Merger reserve |
8,000,000
GBP
|
8,000,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
11,904,200,000
GBP
|
7,564,400,000
GBP
|
— |
| Liabilities |
11,327,300,000
GBP
|
7,155,200,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
11,740,600,000
GBP
|
7,393,600,000
GBP
|
— |
| Current liabilities |
11,286,000,000
GBP
|
7,046,600,000
GBP
|
— |
| Assets less current liabilities [abstract] |