RAF ' s new fighters and bombers and flying boats demonstrated at Southampton . Day and night fighters , general purpose aircraft and flying boats built for the Royal Air Force by Vickers ( Aviation ) limited , were demonstrated at Eastleigh , Aerodrome , Southampton . The Spitfire 1 an all metal , low wing monoplane which is the fastest military machine in the world , was among the planes demonstrated . Photo shows , the new RAF Supermarine Walrus flying boats ( K 5779 , other unknown ) , a Vickers Wellesley long range bomber ( K 7556 ) , and a Wellington Mk 1 prototype ( K 4049 ) lined up on the Eastleigh Aerodrome demonstrated by the Central flying school . 18 June 1936