03/31/2009. Remarks by Johan Visschedijk: "Produced for the RAF as a 504K trainer under s/n H2518, the aircraft became surplus after WW II and was sold in 1920 to the ADC, and subsequently stored. It was registered as G-EBFB to ADC on January 24, 1923, when used by the Bristol Aeroplane Co. Ltd. as a flying test bed for the 100 hp Bristol Lucifer engine. The registration was cancelled on January 7, 1925."