Here's some background on the use of military (government) aerodromes by civilian operators:
NOTAM (Civ)
GOVERNMENT AD: Civil use of: Ref AIP AD 1.1.1 para 12.11, following AD are hereby notified in addition to those listed at AD 1.3 for the purposes of articles 101(1) (B) and 102 of the Air Navigation Order 2000: EGUB; EGDM; EGVN; EGDC; EGXG; EGWC; EGYD; EGDR; EGXD; EGWN; EGQL; EGXU; EGOD; EGDL; RAF MONA (was EGOQ); EGDG; EGOS; EGOV; EGUW; EGOY; EGDY. Refer to GEN 2.4 for location indicator decodes and GEN 3.2.3 for details of RAF AIDU, supplier of info on these AD. AD 1-1-4 refers. (A356/02) (PERM)
CAP 32 - UK Aeronautical Information Publication (AIP, aka "The Air Pilot"), Part 3 - Aerodromes, AD 1.3. Government Aerodromes are available as notified by the above NOTAM, but currently not listed in the AIP (removed by the Nov 2001 amendment). A revised (shortened?) list is to be reinstated in the AIP in the near future and may or may not include all, some or none of the NOTAM listed aerodromes.
CAP 393 - The Air Navigation Order, ANO Article 102:
Use of Government and CAA aerodromes
102 The CAA may cause to be notified subject to such conditions as it thinks fit:
(a) any aerodrome owned or managed by it; and
(b) with the concurrence of the Secretary of State, any Government aerodrome;
as an aerodrome available for the take-off and landing of aircraft engaged on flights for the purpose of the public transport of passengers or for the purpose of instruction in flying or of any classes of such aircraft.
Here’s a decode of the available government aerodromes for those couch potatoes who can't reach for the FIH:
EGUB Benson
EGDM Boscombe Down
EGVN Brize Norton
EGDC Chivenor
EGXG Church Fenton
EGWC Cosford
EGYD Cranwell
EGDR Culdrose
EGXD Dishforth
EGWN Halton
EGQL Leuchars
EGXU Linton-on-Ouse
EGOD Llanbedr
EGDL Lyneham
RAF MONA (was EGOQ)
EGDG St Mawgan
EGOS Shawbury
EGOV Valley
EGUW Wattisham
EGOY West Freugh
EGDY Yeovilton
As to the lack of pax handling facilities and comforts - take a look at Newquay/St Mawgan where the self-loading is ejected/boarded on a taxiway (where fuelling, maintenance, etc are also carried out) with nary a terminal shed to speak of. There are at least 7 scheduled flights a day (mostly RA, I think), and I would estimate that there are about 80-100 thou pax movements a year.
Mind you, looking at the list of aerodromes, it should be fairly obvious which ones may not reappea at the next AIP amendment.