Significant accounting policies - The capital reorganisation (Details) £ in Thousands		12 Months Ended
Dec. 16, 2021 GBP (£)	Dec. 31, 2021 GBP (£) shares	Dec. 16, 2021 $ / shares
Significant accounting policies
Consideration for each share transferred \| shares		1
Maximum amount of PIPE financing		£ 71,594
Share listing expense	£ 84,712
Fair value per share over fair value of net assets acquired \| $ / shares			$ 10.68
Gross proceeds from Business Combination	218,303
Gross proceeds from PIPE financing	71,594
Gross proceeds from issue of Convertible Senior Secured Notes	£ 141,981

Aggregate purchase of ordinary shares pipe financing activities.

No definition available.

Name:	evtl_AggregatePurchaseOfOrdinarySharesPipeFinancingActivities
Namespace Prefix:	evtl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of share listing expense incurred for reorganization.

No definition available.

Name:	evtl_CapitalReorganizationShareListingExpense
Namespace Prefix:	evtl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the consideration for each share transferred.

No definition available.

Name:	evtl_ConsiderationForEachShareTransferred
Namespace Prefix:	evtl_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

The amount of fair value per share over fair value of net assets acquired.

No definition available.

Name:	evtl_FairValueOfPerShareOverFairValueOfNetAssetsAcquired
Namespace Prefix:	evtl_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

The gross proceeds from the Business Combination (de-SPAC merger transaction)

No definition available.

Name:	evtl_GrossProceedsFromBusinessCombination
Namespace Prefix:	evtl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The gross proceeds from issue of Convertible Senior Secured Notes, making up part of the Business Combination (de-SPAC merger transaction)

No definition available.

Name:	evtl_GrossProceedsFromIssueOfConvertibleSeniorSecuredNotesPartOfBusinessCombination
Namespace Prefix:	evtl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The gross proceeds from PIPE financing, making up part of the Business Combination (de-SPAC merger transaction)

No definition available.

Name:	evtl_GrossProceedsFromPipeFinancingPartOfBusinessCombination
Namespace Prefix:	evtl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

No definition available

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration