The story
The association was originally incorporated in England and Wales on 28 April 1975, as the General Aviation Manufacturers & Traders Association Limited (GAMTA), which was based at Brill near Aylesbury in Buckinghamshire, England.
It subsequently merged in August 2004 with the Business Aviation Users Association (BAUA), whose Chief Executive was Derek Leggett, then John Batty from June 2003, which was based in Farnborough in Hampshire. Mark Wilson became CEO of the merged organisation.
The BAUA was mostly concerned with technical requirements for aircraft.
From Wikipedia’s article on BBGA, shared under CC BY-SA 4.0.4