|Geoffrey Martin. The Town. A Visual History of Modern Britain. Vista Books, 1961.|
After being withdrawn from military service in 1969, a novel campervan-like "Heli-Camper" conversion—featuring a built-in mini-kitchen and sleeping accommodations for 4—was also offered by aftermarket modification companies. Winnebago got into the act, modifying S.55's as "The Flying Winnebago."