The hangars at Duxford are the Belfast Truss type, a double-fronted, long hangar. This was the main filming base for the classic 'Battle of Britain' movie, and was a real BoB airfield, although further north of London, in 12 Group. Later in WW2 it was home to the USAAF 78th Fighter group. Today, there is a huge gap, with just a concrete floor, where one hangar was actually blown up for the movie!
The other main airfields with hangars during the BoB were Tangemere, Kenley, Biggin Hill, Hornchurch, Debden, North Weald and Middle Wallop, all of which had large hangars, a mix of the various types used at that period.
Most, if not all of the other fields did not have any hangars, and these were the main defence fields, were Squadrons or Flights would fly to at dawn, ready for action, and return to their main bases at dusk. As with over 90% of all RAF aircraft, of all types, throughout WW2, servicing and repair, and parking, was dispersed around the field, in the open. Hangars, if available, were used only for major, deep servicing.
The easiest type to build for a diorama would be the type seen at Kenley, for example - one of the metal-framed, corrugated iron clad structures, but even the smaller type will be a good size in 1/48th scale.