Fight Them on the Beaches!
In 1989 I was chatting to a Home Guard veteran from Kent. He said that during the summer of 1940, when it was feared the Germans were about to invade, his unit was issued with World War One vintage gas projectors (mortars) and boxes of gas shells. I believe he said they were Mustard Gas. Even though this was 50 years after the event, he lowered his voice when he spoke to me and looked around the room nervously. He explained that they'd been told at the time never to tell anyone that they were issued with gas weapons. However, if the Germans had landed, his job would have been to fire the gas shells onto the beaches.