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Significant accounting policies - Going concern (Details)	12 Months Ended
	Dec. 31, 2021
Significant accounting policies
Projected funding period of cash and cash equivalents held	12 months

X

- Definition

The projected period during which the group's cash and cash equivalents are expected to be sufficient to fund its activities, from the date of approval of the financial statements.

+ References

No definition available.

+ Details

Name:	evtl_ProjectedFundingPeriodOfCashAndCashEquivalentsHeld
Namespace Prefix:	evtl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

No definition available

+ References

No definition available.

+ Details

Name:	evtl_SignificantAccountingPoliciesAbstract
Namespace Prefix:	evtl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration