A more radical variant on the Boulton-Paul Defiant concept - or resurrection of the WW1 pusher concept.
Boulton-Paul P.42
A twin-engined, two-seat, pusher heavy fighter of canard (or twin boom w/tandem engines driving a single prop) configuration, with four .50 MGs or two 20mm cannon grouped in a small manned power turret at the extreme nose. The design acknowledges the main flaw in the original Defiant concept by placing the gun armament in the nose where the pilot can fly and fight with standard fighter tactics. However, the turret allows these guns to be trained separately from the direction of flight to facilitate deflection shooting or maintaining fire on a turning target even if the plane cannot match the enemy's turning radius (the Soviets experimented with this concept in some of their early single-seat jets - including the Mig15 - but the trainable guns had to be aimed by the pilot which made it difficult. This pushes the concept back 15 yearsand adds a separate crewman to do this. Of necessity the plane would be larger and heavier than a standard single-seater - the hope being that the moveable nose battery would compensate for the larger turning circle. Because of all the weight and space associated with the turret and its operator, the plane would also be undergunned -only 4 mgs or 2cannon in a plane the size and weight of a P-38 lighting or Bf-110