Did you know that the word “boffin” was originally military slang and had more to do with a puffin that a scientist? Well you would after a few moments of this light-hearted wartime adventure that follows a group of top secret inventors who are charged with finding a way of creating a portable radar set that can be placed in airborne aircraft. Sent to a remote RAF installation, “Prof. Heatherville” (Ralph Richardson) leads quite an eclectic team of colleagues amidst quite a bit of scepticism as to why they are not all out at the front and not sitting in a drawing room having tea! Things…