Dyson has unveiled plans for a 10-mile test track in Wiltshire where its new electric cars will be put through their paces.
The track and other facilities are part of a plan to start selling a “radical” electric car from 2021.
The company best known for its vacuums and domestic appliances bought the disused airfield at Hullavington two years ago.
Dyson has already renovated two hangars built in 1938 at the 517-acre site.
That redevelopment has cost £84m and the next phase of the airfield’s development would take Dyson’s total investment to £200m.