www.ukmil.org.uk has released two freeware sceneries. First is RAF College Cranwell by Keith Steadman. This RAF Station is in Lincolnshire, UK and is used to provide initial training for all air crews. Currently this is only for FS2004 (but could also work in FSX SP1 only).
Also released is RAF Barkston Heath by Stephen Legg and Keith Steadman for FS2004 and FSX. This small airfield is a satellite airfield for RAF Cranwell and is used by the Joint Elementary Flying Training School with their firefly aircraft.
Come over to www.ukmil.org.uk and check it out.