Thanks lads. Now just a bit of silliness based on the Wellesley...
The first is the Type 294 Wellesley PR Mk III, immediately distinguished by its Rolls-Royce Merlin I engine. But the Type 294 was actually a twin-engined design. Where the observer's cockpit had been, sat a 'slave' Rolls-Royce Kestrel XVI driving a large Bentley blower to boost the Merlin's high-altitude performance.
A less successful Type 294 descendant was the Vickers Wellington (aka 'Twin Wellesley'), a twin-engined bomber. Intended as a fast bomber, the Wellington proved anything but. By the time the Wellington began reaching RAF squadrons in 1937, the type was already obsolete.