Share-based payments - Fair value of options granted (Details) £ / shares in Units, £ in Thousands	12 Months Ended
Dec. 31, 2024 GBP (£) plan £ / shares	Dec. 31, 2023 GBP (£) £ / shares	Dec. 31, 2022 GBP (£) £ / shares
Share-based payments
Number of employee option plans \| plan	2
Total Expense Recognised \| £	£ 7,486	£ 8,816	£ 23,189
EMI Scheme
Share-based payments
Total Expense Recognised \| £	344	732	£ 7,858
Average share price at date of grant \| £ / shares			£ 50.7
Expected volatility (%)			50.00%
Vesting period in years			2 years 9 months
Risk-free interest rate (%)			1.25%
2021 Incentive Plan
Share-based payments
Total Expense Recognised \| £	£ 7,142	£ 8,084	£ 14,512
Quarterly vesting percentage	6.25%
Average share price at date of grant \| £ / shares	£ 7.13	£ 9.5
Expected volatility (%)	90.00%	89.58%
Risk-free interest rate (%)	4.43%	4.78%
2021 Incentive plan - Compare Share Option Plan (CSOP)
Share-based payments
Average share price at date of grant \| £ / shares		£ 6.2
Expected volatility (%)		90.00%
Vesting period in years		2 years 7 months 17 days
Risk-free interest rate (%)		4.80%

Percentage of quarterly vesting of awards under share-based payment arrangement.

No definition available.

Name:	evtl_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsQuarterlyPercentage
Namespace Prefix:	evtl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of employee option plans.

+ References

No definition available.

+ Details

Name:	evtl_NumberOfEmployeeOptionPlans
Namespace Prefix:	evtl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

No definition available.

+ Details

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

- Definition

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

+ References

+ Details

Name:	ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]]

+ References

+ Details

Name:	ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=evtl_EnterpriseManagementIncentiveSchemeEmiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=evtl_IncentivePlan2021CompanyShareOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: