Contract liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Contract Liabilities [Abstract]

Schedule of Contract Liabilities

Contract liabilities comprise entirely deferred revenue in respect of the Mallinckrodt, AstraZeneca plc, and Hansoh Research collaborations.

	December 31,
	2021			2020
	£000s			£000s
Contract liabilities:
Current		4,247			17,042
Non-current		72,501			51,337
Total contract liabilities		76,748			68,379
	Current			Non-current		Total
	£000s			£000s		£000s
Contract liabilities:
At January 1, 2020		2,478			15,515		17,993
Additions during period		19,779			35,822		55,601
Revenue unwound during period		(5,215	)		-		(5,215	)
At December 31, 2020		17,042			51,337		68,379
At January 1, 2021		17,042			51,337		68,379
Additions during period		4,166			16,226		20,392
Revenue unwound during period		(12,023	)		-		(12,023	)
Program rephasing		(4,938	)		4,938		-
At December 31, 2021		4,247			72,501		76,748