S'land.
A very logical postulation!
The Alcock A.1 a.k.a. the Sopwith Mouse. It basically used the upper wings of a Pup the lower wings and forward fuselage modified from a Triplane and the tailplane of a Camel mounted on a new build rear fuselage and fin and rudder. The top wing was at eye level , thus improving the pilots overall field of view, particularly in the upper hemisphere.
As you can see in the drawing below it is not the aeroplane in question though.
Do look again at the mystery aircraft for its aerodynamic feature claim to fame.
