BTR Aerospace Group was renamed by BTR plc after the acquisition of the Dunlop Aviation Division from Dunlop Rubber in 1985.
It was a group of four companies:
In 1996, Dunlop Aircraft Tyres Limited was sold by BTR plc to form an independent company. It is based at Fort Dunlop, Birmingham, England.
In July 1998, Doughty Hanson & Co purchased BTR Aerospace Group and renamed it Dunlop Standard Aerospace Group.
References
BTR Aerospace Group Wikipedia(Text) CC BY-SA