In the olden days (up to about the mid-1990s!) the island of Canna off the west coast of Scotland that had a ten-subscriber phone exchange where you could dial

In the olden days (up to about the mid-1990s!) the island of Canna off the west coast of Scotland that had a ten-subscriber phone exchange where you could dial any number on the island with a single digit. You could only make one call at a time off the island, via a VHF link on around 80MHz to the telephone exchange in Mallaig about 25 miles away.