Apparently it was designed as a ground support aircraft, which (sorta) explains why the guns are all in the back. The idea was to use the turret guns to shoot invaders on the beaches of England.
Looking at it makes me think they took the idea and cobbled the plane together from more or less off the shelf parts. You can see the family resemblance to the Lysander utility plane, and it at least looks like a classic bomber quad turret.
But yeah, butt ugly.