Material accounting policies - Share based payments and Reverse Stock Split (Details)		12 Months Ended
Sep. 20, 2024	Dec. 31, 2025 plan
Material accounting policies
Number of employee option plans		2
Number of share-based payment plans		2
Stock split conversion ratio	0.1

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

No definition available.

Name:	evtl_IfrsStockholdersEquityNoteStockSplitConversionRatio
Namespace Prefix:	evtl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration