Barry Lloyd examines the Trislander which was developed from the successful Islander.

John Britten and Desmond Norman had both trained with de Havilland and began developing crop spraying equipment in the mid -1950s using de Havilland Tiger Moths which had been modified at their factory on the Isle of Wight, for a contract in Sudan. Following this, they turned their hand to aircraft design, put their combined creative aviation brains together and, having made a detailed analysis of the light aviation market, decided there was a demand for a twin-engined utility aircraft with a minimum of complex systems.