Hi Ian the vehicle behind is an old air transportable aircraft refueler. This was used by the training instructors to lay contaminated aircraft fuel for the hot fires. Health and safety hadn't got round to banning its use in the 80's.
Added by Des on 17 June 2013.
Thanks Des. Thought it might be early Thornycroft Engine. My Father was a Fire Fighter before Health and Safety he had fuel and acid burns to prove it!!! Cheers
Added by Ian Lisseman on 17 June 2013.