[Graham Boak]

If it is single-engined then it isn't British, though I'm not sure what it could be. Look at the underside of the wing. It has flaps, making it a modern design. In front of the flaps is some sort of structure. For a single-engined aircraft this would have to be a rearward-retracting undercarriage. However, the wing and tail are not those of an LN140 variant. The fuselage is too big for a Battle.

For a twin, the the outerwing with flaps and ailerons looks like a Blenheim. The rear fuselage could be that of a Blenheim upside down, although it is not clear why the rudder should be so light, unless we are simply seeing the framework and the field beyond. The overall length of the fuselage looks appropriate for a light twin or single-engined aircraft, not a large heavy. The fuselage is too big for a Potez 63 series and the Bloch 174 has dihedral on the tail. It also looks too big for a Breguet 693.

I'm not sure that Blenheims would be carrying roundels on a dark underside, but maybe. There's an outside chance of it being a Glenn (Maryland) but on balance I have to come down (if a little reluctantly) on it being a Blenheim.

Perhaps a poring over plans might come up with other evidence on the precise wing tip/aileron shape or nacelle structure?