 The floatplane version was not a success and they were soon removed.With the original Aeronca-JAP engine fitted it was delivered on 29 May 1959 as the personal aircraft of Westland Aircraft test pilot H J Penrose, who christened the aeroplane 'Airymouse' and wrote a book of the same name about his experiences flying the aircraft.The second aircraft, registered G-APWT had a number of different engines fitted for trials, including a 60 hp Rover TP60/1 industrial gas turbine engine,
before being delivered to Elstree Aerodrome in 1962.