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Financial instruments, Other non-current financial assets (Details) - GBP (£)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other non-current financial assets [Abstract]
Lease security deposit for buildings	£ 786,000	£ 2,532,000
Other Non-current Financial Assets [Member]
Other non-current financial assets [Abstract]
Lease security deposit for buildings	786,000	£ 2,532,000
Legal settlement	145,000
Good faith deposit	£ 51,000

X

- Definition

The amount of long-term deposits held by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 55
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-URIDate 2020-01-01

+ Details

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Balance Type:	debit
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X

- Definition

The amount of fee and commission expense that the entity does not separately disclose in the same statement or note. [Refer: Fee and commission expense]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

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X

- Definition

A settlement is a resolution between disputing parties about a legal case, reached either before or after court action begins. The term "settlement" also has other meanings in the context of law. Structured settlements provide for future periodic payments, instead of a one time cash payment.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- References

No definition available.

+ Details

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- Details

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