This is the Titan shuttlecraft model used in the Doctor Who story The Invisible Enemy, notable as the tale that introduces The Doctor's mechanical companion, K-9.
There was two scaled versions on display, one large and one small.
The larger version was originally fitted with an air canister which when operated created the illusion of vertical jets.
Both versions have interchangeable payloads, either Ambulance or Tanker to make it appear there was more than one craft.
As it appeared on screen.
This Moon Shuttle appeared in the short-lived 1973 Sci-fi series Moonbase 3.
The spacecraft Dispensable appeared in the 1992-94 children's Sci-fi show Space Vets. For anyone who never saw the series, it was about a bunch of misfit space vets travelling around the galaxy helping alien animals.
Space Vets could be described as a kid's version of Red Dwarf, with oddball wisecracks, and one of the characters, No. 2 being very reminiscent of Red Dwarf's' Rimmer.
Again, two scales were on display, one large and one small.
As the Dispensable appeared on screen.