Please have a look at http://www.photoarchives.co.uk/pagecma/cmahome.htm
An example :-
To find a few more, on the site scroll down on the Left Hand Side till you see :-
"What appears to be a sale, including German vehicles, c1920 at Aldershot...."
The sections above and below that narrative are a sale of captured / surplus vehicles in the 1920s.
As I say, it's not really my period, but I found these looking for something else.