John Strang is an aviation inventor.
A man still in his mid-to-late 20s when we meet him in 1916 [and the same for our encounter in 1942 - I will explain in a moment], John Strang had for a couple of years served with exceptional distinction in the British Air Corps [British Royal Air Force]. Prior to that he had been earnestly and diligently working with his partner and best friend, Dick Balvil[le] in the creation of a revolutionary new aircraft design. Then the War came and while both wanted to serve their country, the desire to finish the creation of this new flying machine which would practically have the ability to stop and hover in place was too intense and vital to abandon. They flipped a coin, the result of which was Strang signing up.
"To the public John Strang was little known save as a young aeronautical engineer who, before the war, had carried out a few hazardous experiments in flight. But to a limited circle of experts he was something more than an airman. For a very brief period he had held a commission in the [Royal Naval Air Service/Royal Air Force] and then, unaccountably enough to some people, he had quietly left his squadron and returned to civil life. Only in the Air Ministry was it know that they had pressed him to accept promotion to wing-commander while he was seconded to special service. He had refused in order that he might carry on his work in his own way free from fear of official restraints."
That work was to find out why his friend had plunged thousands of feet to his death; to learn who had sabotaged the experimental plane and who was working non-stop in the shadows to get their hands on the plans.
Which is how Strang would come into close working arrangements with the Special Branch as that organization put considerable effort into tracking down the aviation spies that they had learned Germany [Kaiser directed or Nazi oriented, as it were] had dispatched to the shores of Britain. What Strang would help that intelligence organization learn was that the cell was not only determined, they were impressively skillful and devastatingly brutal.