Mobile Phones and Fringe Coverage

Mobile Phones and Fringe Coverage.I have this habit with mobile phones and cell coverage that when I see something that interests me, even if I am holiday, I have to see what I can find out about it there and then. Whilst on holiday in Cornwall I noticed the area I was staying had fringe coverage. I thought this was strange as I would have expected to find the Cornish village of Mousehole to have