Kingsand-Cawsand is an interesting place, and I don't know of another similar example in England. It is for practical purposes one village, but before the county boundaries were revised in the 19th century the border went through the middle, with Kingsand in Devon and Cawsand in Cornwall. (Now it's all in Cornwall.) It was once a very violent place. My great-great-great grandfather was captain of a revenue cutter based in Cawsand and was very active in suppressing smuggling, and survived several attempts on his life.