[David_Hayward (RIP)]

I gathered from online comments that the car is in fact a 1946 or other post-war car, tricked-up to look like a pre-war version. I have a 1939 Wolseley advert with a printed photo of a car identical to that of the trainer car but of course there is no model description!

It does seem from blowing up photos that the L/Cpls and presumably Corporals were from the FANY.