The earliest dayglo type example that I can remember, is the Automobile Association Auster Alpine G-APAA, which was painted bright yellow for all lettering and the AA badge, this was registered 23/6/56. I cannot remember anything prior - even military.
Re colour film, for individual filming and shots, it simply was not available, the developing process was extremely complex and results very variable. I worked in BOAC's photographic unit in London for a couple of years, where we did all of the publicity photography and developing, and we kept to B & W, even when we did all of photographs of Princess Margrets wedding dresses as they were designed by Norman Hartnell !!. (could have made a fortune from the press, but we were very honest/loyal).
I was given a 50 foot length of 35m Positive Eastmancolor film by the sales rep about 1959 to try out at a Brands Hatch motorbike race, but the result was very poor. It was only the film industry that got it going.
I will try & send over a photo of PAA in a minute - Plado I will be back at some stage for Bucketshop tuition!!
Cheers
