1st clue.
Only three converted, one "A", and two "E's" ???????

2nd clue
" The Soviets did perform at least three conversions of ????? to trainer configuration."

Looks like some kind of P-39/P-63 prototype or sub-variant.

Close enough, it is.
Well done mate.
There were several two-seat adaptations of the Kingcobra, which paralleled the development of the TP-39 two-seat Airacobra.

The TP-63A-10 (Model 38) was a proposed two-seat Kingcobra variant. It was basically inspired by the two-seat TP-39 Airacobra. A new cockpit grafted onto the nose ahead of the existing cockpit of the P-63, with a leftward-opening canopy installed. All armament was removed, and a ventral fin was added. The basic idea was for the company to build conversion kits for existing P-63A-10 aircraft. However, none were actually built at the factory, although at least three were completed in the Soviet Union (42-69304, 42-70503, and 43-11334).

An entirely different two-seater was produced by the Bell company for internal use. Two P-63E-1s were modified by Bell with a separate observer seat in the rear fuselage, located behind the engine and mounted under a separate canopy. A probe was mounted which extended through the spinner, and to make space for the observer the radio equipment had to be moved forward into the armament bay. The aircraft carried the civilian registrations NX41963 and NX41964.

And the prize of course

This weeks headache, & slightly different.

What's wrong with this photo ??
Have fun.

That tail section looks pretty odd for a Hurricane. Field modification or something to test angling the tail down? There's a pretty visible line just aft of the cockpit extending all the way down to the wings.

The aircraft is normal ???

This photo has also got two problems ???

I don't think there was a Hurricane squadron that used the KV code.

On the right path.
So why do these Hurricanes carry wrong codes???

Are the photos from the movie Battle of Britain?