This was in no small part because of the British invention of the resonant cavity magnetron
, or radar, which changed the method of aircraft control in blind landing configurations.
Bowen indicated that the Tizard Mission(*) did not even mention the topic when they brought the cavity magnetron
to the USA, although they had almost five years of experience with AJ by then.
Other facts in the film include Birmingham being the place where the cavity magnetron
was invented, a key component of radar and something found in every microwave oven, as well as it being the home of icons like the Spitfire and the original Mini.
Well, during World War II, Birmingham University Professors, John Randall and Harry Boot, created a gizmo called the cavity magnetron
But the greatest prize of all was the cavity magnetron
- Britain's most closely guarded secret.