In this country, the term shooting brake, or break which is a bit French, got to be sort of interchangeable with estate car or station wagon, (or minibus).
If the Bedford you are referring to looks like the one in the picture, but with windows, it may be a Dormobile conversion. There were various other makes, but you could go from one with wooden benches and aimed at transporting teams to building sites, to more car-like upholstery, or a small two person caravan. UOG was a Brum registration about 1958. Those vans went through various redesigns from the early fifties until 1969.
www.imcdb.org
en.wikipedia.org