Heston
Hi Lawrence
I worked over there from 1953 to 1955, and all the men that were there when you wanted info on have long died.
I never remember any photos about those planes,but there may have been at the Speedbird club at Brentford, they moved to Cranford, but they may be now over at Heston?.
Worth calling in if you pass, and you may be lucky.
All the best
John