The Air Training Corps (ATC) is a cadet organisation based in the United Kingdom. It is a voluntary youth group which is part of the Royal Air Force Air Cadets. The ATC is largely composed of individual units known as squadrons. These squadrons are organised into several different wings, which in turn are organised into six different regions. Together the regions make up the corps. Headquarters air cadets (HQAC) is located at Royal Air Force College Cranwell, Lincolnshire and headed by Commandant Air Cadets Air Commodore Tony Keeling OBE. Founder squadrons and detached flights The first 50 squadrons formed have their squadron numbers followed by an F to show they are "founder" squadrons (e.g. No 2F(Watford) Squadron). Only 30 are still in existence, as the other 20 have disbanded over time. Founder squadrons that have reformed after being disbanded do not retain the F status, such as XIX (19) Crawley . In towns not large enough to sustain a squadron of 30 cadets, or as a supplement to an existing squadron in a larger town or city, a detached flight may be formed. This operates much like any other unit, but is technically a component part of a nearby larger squadron. There are currently approximately 48 detached flights, denoted by the letters "DF" after a squadron number. Central & east region Region HQ RAF Wyton Bedfordshire & Cambridgeshire wing Wing HQ RAF Wyton Hertfordshire & Buckinghamshire wing Wing HQ RAF Halton Norfolk & Suffolk wing Wing HQ Norwich South & East Midlands wing Wing HQ RAF Wittering Trent wing Wing HQ RAF Digby Essex wing Wing HQ RFCA Chelmsford London & South East region Region HQ RAF Northolt Kent wing Wing HQ Maidstone London wing Wing HQ (shared London, Middlesex, Surrey WHQ) Middlesex wing Wing HQ RAF Northolt Surrey wing Wing HQ (merged WHQ with London & Middlesex) Sussex wing Wing HQ Seaford North region Region HQ RAF Leeming Central & East Yorkshire wing Wing HQ RAF Topcliffe Cumbria & Lancashire wing Formerly Cumbria and North Lancashire wing, merged with East Lancashire wing in 2011 Wing HQ Inskip Durham & Northumberland wing Wing HQ Knightsbridge, Gosforth, Newcastle upon Tyne Greater Manchester wing Wing HQ University Barracks Manchester 2056 (Knutsford) Merseyside wing Wing HQ RAF Woodvale South & West Yorkshire wing Wing HQ Castleford South West region Region HQ Devizes Bristol & Gloucestershire wing Wing HQ RAF Quedgeley Devon & Somerset