Intangible Assets - Summary of Detailed Information about Intangible Assets (Detail) £ in Thousands	6 Months Ended
Jun. 30, 2022 GBP (£)
Disclosure of detailed information about intangible assets [line items]
Beginning balance	£ 24,564
Ending balance	24,116
Cost or valuation [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	33,005
Depreciation/Amortization and impairment [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	(8,441)
Revision to estimated value	(448)
Ending balance	£ (8,889)

The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2021-01-01
-Paragraph 118
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&anchor=para_118_e&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 54
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_c&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_IntangibleAssetsOtherThanGoodwill
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant