Aboutface!
Chugalug2 has raised dormant memories of the small hangar at Hullavington. It was indeed an Aircraft Repair Shed, basically a small C-Type (as the sim/gym at Brize), and it was used in latter days by the Balloon Squadron. That piccy is NOT of the smaller hangar so I concede that this is indeed South Cerney.
The later piccy is Abingdon as there is only one of that type of hangar in the UK.