My Dad was an electrical Engineer. He volunteered and was sent to Carlisle for interview. He was asked if he went to a private school or a public school he replied that it was a public school i,e, the local council school near his home. Apparently being a Public School boy meant you were officer material so he was assigned for officer training in the Royal Marines. Soon his employers - an Electrical Engineering firm - slapped an essential worker label on him and he thought that was that. A few months passed then he heard that his Firm's essential worker status had been overruled and he was to report to an air field in Croyden.
When he arrived there he had to sign the Official Secrets Act then was briefed that he would be a civilian worker, part of a top secret team working to design an ejector seat for combat aeroplanes. The boffins working on this project needed a skilled trades man to manufacture their designs.
He remained in London for the entire war, going to his digs late one night to find the whole street flattened and was left with his dungarees and 10bob in his pocket .Later he developed pleurisy, so was sent home to recuperate. His train was strafed on the way and, as civilian he was refused tea/food by the WRVS.
Back home for in Scotland for2 weeks,My mother somehow arranged a wedding so that she could return to London with him. My Mum was a trained hairdresser and Barber which was, for the sake of moral, another reserved occupation, so she was assigned to a barbers shop and spent the rest of the war there
I knew nothing of this until their Silver Wedding when they felt free to tell the tale to the family. Likewise I now feel able to say how my Dad helped to win the war or at least the lives of some airmen.