A high altitude radar guided dogfight

12th April 1943: The RAF test fly new a new Mosquito variant - as the war continues to push technological innovation

A Junkers 86 in Hungarian markings in flight. It was obsolete by 1942 but a longer winged 'P' variant with uprated engines and pressured cabin was capable of 39,000 feet and more.

The arms race continued in all areas of the war. When the high altitude Junkers 86 P was seen as a 'speck of silver' high above Britain in 1942, countermeasures were needed. It…