AOPA UK Aircraft Owners and Pilots Association UK  
  Ascent Flight Training
Birmingham Airport Limited
  Blackpool Airport
BBAC British Balloon and Airship Club
BGA British Gliding Association
BHPA British Hang Gliding and Paragliding Association
BHA British Helicopter Association
BMAA British Microlight Aircraft Association
BPA British Parachute Association
Cambridge International Airport
CAA Civil Aviation Authority  
CHIRP UK Confidential Human Factors Incident Reporting Programme for aviation
  Damyns Hall Airfield
  Flyer Magazine
GAA General Aviation Alliance
GATCO Guild of Air Traffic Control Officers
Leeds Bradford International Airport
LAA Light Aircraft Association
Light Airlines
Light Aviation Magazine
Met Office
MOD Ministry of Defence
NATS National Air Traffic Services
  Pilot Magazine
RAeC Royal Aero Club  
  Shoreham Airport
  Stapleford Flight Centre
  UK Airprox Board