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Other non-current financial assets (Details)		12 Months Ended
	Nov. 06, 2020 GBP (£)	Dec. 31, 2020 GBP (£)	Dec. 23, 2020 GBP (£)	Nov. 06, 2020 USD ($)	Dec. 31, 2019 GBP (£)
Other Non-current Financial Assets [Abstract]
Long-term security deposits		£ 786,000			£ 2,532,000
Prepayments		3,427,000			1,858,000
Other		197,000			0
Other non-current financial assets		4,410,000			£ 4,390,000
Repayment of security deposit		£ 1,800,000
Other Noncurrent Assets [Member]
Other Non-current Financial Assets [Abstract]
Amount due under settlement agreement			£ 146,000
Oxford Debt Agreement [Member]
Other Non-current Financial Assets [Abstract]
Facilities fee	£ 51,000
Debt instrument face amount | $				$ 50,000,000

X

- Definition

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

+ References

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- Definition

The amount of non-current prepayments and non-current accrued income. [Refer: Prepayments; Accrued income]

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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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- 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]

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- Definition

The amount of non-current financial assets that the entity does not separately disclose in the same statement or note. [Refer: Other financial assets]

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- Definition

The amount of receivables due from related parties. [Refer: Related parties [member]]

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The amount of other deposits held by the entity.

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The cash inflow from the repayment of security deposits held by the entity.

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