Thanks everyone for your most helpful replies info and photos. I was a Junior with KLM at Croydon Airport in 46 and would wander around what I feel certain were JU52s in various airline livery but as they may have been revamped and renamed as Toucans CASA Jupiters etc I need to be prepared to have solid info available to answer a most pedantic adversary and I am grateful you have all replied with the info that should settle the score.
One more request. This same person also states categorically that NO DC3
AIRCRAFT OPERATED IN OR OUT OF CROYDON AFTER 1939 . Bearing in mind the many variants or names to muddy the water including C47 - Dakota - Travelair - Skytrain etc - what I need is info clearly designating that DC3's were operating at Croydon after 1939 and through the Post War years.