The County Flying Club moved to Rearsby in 1938 and created an aerodrome on land owned by Sir William Lindsay Everard.
Post-war, the company began using its manufacturing skills to supply the re-emerging UK motor industry.
Auster was now part of Pressed Steel Company which in turn was a division of the British Motor Corporation.
Rearsby Automotive expanded its sales quickly in order to occupy the whole site, before British Leyland sold off the former aircraft factory and airfield.
In 1981, British Leyland, as part of its consolidation process, announced to the Rearsby management, the plant was to close.
The site, now Rearsby Business Park, is still owned by the original MBO team.
Following the failure of Adwest to nurture and grow the business and the closure in 2003, the MBO team spent over £2m renovating and improving the buildings and site with the principal aim of re-establishing employment back to Gaddesby Lane.