Alcock Scout

The Alcock Scout, a.k.a. A.1 and Sopwith Mouse, was a curious "one-off" experimental fighter biplane flown briefly during World War I. It was assembled by Flight Lieutenant John Alcock at Moudros, a Royal Naval Air Service base in the Aegean Sea. Alcock took the forward fuselage and lower wings of a Sopwith Triplane, the upper wings of a Sopwith Pup and the tailplane and elevators of a Sopwith Camel, and married them to a rear fuselage and vertical tail surface of original design (presumably by Alcock himself). It was powered by a 110 hp Clerget 9Z engine, and carried a .303 Vickers machine gun.
Affectionally referred to as the 'Sopwith Mouse' by Alcock and his fellow designers, Alcock never flew it himself, but squadron-mate FSL Norman Starbuck made a few flights in it, the first on 15 October 1917. However, it crashed in early 1918, was written off and never flew again.