The Wellesley was the first aircraft to be constructed entirely on the geodetic principle developed by B.N. Wallis. Vickers chief designer Rex Pierson co-operated with the scientist in coming up with the winner of the Air Ministry Spec G4/31 for a general purpose torpedo bomber. Having said that, I always thought that the Wellesey was a particularly ugly design.
Nevertheless some 176 were produced for the RAF of which 100 or so were still operational at the outbreak of WW II, serving mainly in the Middle East against Italian forces. The three pictured above were part of the RAF Long-Range Development Flight, two of which made history in 1938 when they established a long distance record with a non-stop flight from Ismailia, Egypt to Darwin Australia, a distance of 7,158 miles This world absolute distance record held until 1945.