Southampton CMD convoy

[David_Hayward (RIP)]

We have all seen the photo of the vehicles outside the Southampton CMD, circa May 1940. Now that I have the likely production figures I am trying to associate which vehicles were which in the prod. figs. For example 30-cwt Ambulances are listed and as can be seen here there is a what I believe to be F30S if ot's a 30-cwt..I am sure that I cannot see a front bumper spring.
Cany anyone suggest what the other trucks are please, and m/cs?