I live in northern England and there are still signs referring to "The NORTH". Obviously this refers to the fact that if you travel north you will reach Scotland.
Scotland has these signs too. Obviously these refer to northern Scotland.
Surely when you reach John O'Groats, or more properly Dunet Head, these signs stop? Or is it only when you get to the Shetland islands?
Image taken from: http://www.search.com/reference/A1_road