For every military, public or private airport, aerodrome or airspace containing an IATA code in the United Kingdom (England, Northern Ireland, Scotland, Wales), name the 3-letter IATA code.
RAF = Royal Air Force; RNAS = Royal Naval Air Stn
codes not on the official IATA website are excluded, even if they may still be on Wikipedia or FlightRadar24.
Information according to Wikipedia, FlightRadar24 and IATA.