I want to know the answer to the following question:
In 1940 a German prisoner overheard boasting that the British would never find what system?
All the background I'm provided with is that "The details of the conversation were passed to an RAF Air Staff technical advisor, Dr. R. V. Jones, who started an in-depth investigation which discovered that the Luftwaffe's Lorenz receivers were more than blind-landing devices.". Is that enough to answer the question?