Here’s an odd item I came across. During WWII, the narrow-gauge Romney, Hythe and Dymchurch Railway (located in Kent) operated a miniature armoured train, which it used to patrol the coast in case of invasion. It carried two Boys anti-tank rifles and four Lewis machine guns, and was manned by the 6th Battalion, Somerset Light Infantry. It supposedly shot down a Messerschmitt Bf 109, a Heinkel He 111 and a Dornier Do 17. There are two pictures of it here:
http://liberalengland.blogspot.ca/2009/05/romey-hythe-dymchurch-goes-to-war.html
http://en.wikipedia.org/wiki/File:Romney,_Hythe_and_Dymchurch_armoured_train.jpg