Check out the FV2504 series of trailers available with different bodies such as office, film processing etc. Chassis could be Rubery Owen, Taskers or Sentinel.
Got to admire their solution for transporting a Land Rover to the workshops, mk2 Scammell Explorer and 20 ton low loader. Reminds me of an in service Explorer with a green Minivan on suspended tow parked outside a cafe on the A5 at Cricklewood around 1979.