Five Wellesley single-engined long-range bombers were modified to Vickers Type 292 standard for the RAF's Long-Range Development Unit, with changes including low-drag long-chord cowlings. L2680, centre, and L2638 set a new world distance record in November 1938, flying from Egypt to Darwin, Australia. L2639 landed in Kupang, Dutch Timor, but also broke the previous record. The aircraft then continued to Australia, made an emergency landing while touring the country and ended up in the RAAF as an instructional airframe.