RAF 615 (County of Surrey) Squadron was a unit of the Auxiliary Air Force, later to become the Royal Auxiliary Air Force, between 1st June 1937 and 1957.
With operations dating back to 1914, RAF 9 Squadron, sometimes No. IX (Bomber) Squadron, is the oldest dedicated bomber squadron in the Royal Air Force.
Royal Air Force No. 12 FTS (Flying Training School) operated between 1938 and 1955, based at RAF Grantham, Lincolnshire during the Second World War.
Royal Air Force No. 22 OTU (Operational Training Unit) flew out of RAF Wellesbourne Mountford, Warwickshire as part of No. 6 Group RAF Bomber Command.
At the outbreak of World War Two, RAF 103 Squadron became part of the RAF Advanced Air Striking Force seeing action in France during the Battle of France.