Freight Rover 255 Van
These were made from 1984 to 1989 and superseded the Freight Rover branded Sherpa that was introduced as a Leyland in 1974. This looks like a British Telecom liveried van with a 'lift off box van' rear end, though I couldn't see any decals to prove it. Seen at a breaker's yard near Keighley.
sherpavanfreight roverbritish telecom