Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Accounting Judgements and Estimates (Details)

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Accounting Judgements and Estimates (Details) - GBP (£)
£ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of accounting judgements and estimates [text block] [Abstract]      
Employee and contractor development expenditure £ 13.8 £ 1.6 £ 3.2