Report of Directors Corporate Governance - Payments to past Directors (Details)	12 Months Ended
	Dec. 31, 2020 GBP (£)
Disclosure of transactions between related parties [line items]
Payments to key management personnel in excess of minimum threshold	£ 0
Former Directors
Disclosure of transactions between related parties [line items]
Payments to key management personnel in excess of minimum threshold	0
Key management personnel, threshold minimum	£ 50,000