Instone is one of the oldest names, maybe the oldest, in the UK's air transport industry. It started life as Instone Air Line, created in 1919 primarily to support the Instone Shipping Line by flying bills of lading to ships' destinations before the ship arrived, to speed up clearance, but also offering passenger and cargo transport. The airline was amalgamated into Imperial Airways, and thus eventually into BOAC and therefore BA.
Unfortunately the OP can't have the name, because the company retained the name on amalgamation, and from 1976 to the present day operates as Instone Air, a specialist in transporting valuable live animals by air, all over the world.