The two men standing in front are wearing the same shirts and caps with some sort of emblem on them. If this is not a military photo then it may be a company uniform. An English made truck but was the photo taken in England or somewhere else?
JM's comments made me take a further look into the dark archives.
While I do not have a definitive answer, some more clues.
1. I have two fairly small picture books on the history of Bedford trucks and in viewing all the photos of the era, 1930's, I do not see one photo with a mirror on the left side when the vehicle is being used in the UK.
The uniform style looks British to me but that was a style also popular on the Continent. For what it is worth, Bedfords were marketed in all of the Scandinavian countries as well as the Low Countries so that may be a part of the answer.
2. JM's comments also led me to look at all the fuel truck photos I could find and he may be correct in that most of them of that era had similar vents/filling caps. Not exactly the same but similar. As well most had what look like assist handles or bars like Larry's photo.
Anyway, I post here a photo of another later Bedford, an ML, with a tanker body and on the next page one of the earlier WLT trucks as a cargo carrier.
Tim posted a pic of a truck on 20th of April this year. Now my question. Could it be an Austrian Fross-Büssing truck. I only have the information, that Fross-Büssing produced MAN-trucks in licence (MAN E 3000 and MAN F 5), but they also produced their own trucks. I´ve read about two types: II FB 5 and 4000.
Does anybody have some more information and maybe pics of Fross-Büssing trucks?