Avro 523 Pike

The Avro 523 was the first Avro airplane ever to receive a name and flew for the first time in May 1916. It was designed to an admiralty requirement for a long-range airplane that could perform anti-zeppelin duties and escort duties, as well as scouting and light bombing ones.
The pilot seated ahead of the engines and the gunners seated both in fore and aft. Each of them had a twin 0.303 Lewis Mk.II machine gun. It was made out of wood with fabric skinning and the first prototype was powered by two 150hp sunbeam eight-cylinder liquid-cooled engines mounted in a pusher configuration. A second prototype was built, the 523A, which was powered by a pair of 150hp Green six-cylinder liquid-cooled engines and a scarff-ring for the forward mounted machine guns.
After testing, the admiralty jugded it as obsolete and didn't place any order. Both prototypes were used as testbeds for the remainer of the war.

Sources:
1. https://en.wikipedia.org/wiki/Avro_523_Pike
2. http://www.aviastar.org/air/england/avro-523.php
3. Salamander Books - The Complete Book of Fighters