Apologies - I realised I'd misquoted the make after I'd posted my reply.
It should be the Morrison-Electricar A1 quarter-ton electric van from c.1970.
Quite a number of changes (six) to the title of the manufacturers since 1934.
I believe the manufacturer of this particular model was Crompton Leyland Electricars Ltd. of Tredegar, Monmouth, UK (1968-1972)