here may have been either a requirement (or very strong suggestion ?) that one or more crewmen be provided with observation windows in the side of the aircraft as Bristol and Hawker drawings both show some sort of window below the high mounted wing.
The Barracuda also had this 'Observer's Lounge' under its wing, which was the centrepoint of the design, with the aeroplane designed around it, it seems. It too was a Torpedo Bomber Reconnaissance aeroplane, combining the duties of torpedo carrier, dive bomber and recon platform able to be fitted with floats too (! If ever there was a good reason not to make a multi role carrier based airframe, the Barracuda is it!) Lobelle tried to make an advanced design but bit off more than he could chew with its aerodynamics, which can be laid at the original spec requiring different things from the same airframe.