The Halton Mayfly was a British two-seat biplane designed by C.H. Latimer-Needham and built by the Halton Aero Club between 1926 and 1927. Registered G-EBOO and named the HAC.1 Mayfly it first flew on the 31 January 1927. It was converted to a single-seater and was flown in a number of air races including the King's Cup Race. It was entered in the 1926 Lympne light aircraft trials as No. 8 but failed to turn up in time for the elimination trials.
Made by Halton Aero Club.