Directors and Staff Costs - Summary of Total Average Number of Employees (Details) - Employee	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number And Average Number Of Employees [Abstract]
Research and development and related support services	66	39	30
Administration	26	26	16
Total average number of employees	92	65	46

The average number of personnel employed by the entity during a period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration