This is an image I found on the BBC website today in a story entitled Phone Calls Used to Redefine UK Regions. Based on analysing anonymised phone records, it shows how the amount of time spent on landline phone connections could redefine the sense of the regions Britain is divided into. For example, there is more divide between north, mid and south parts of Wales than across the border with their neighbours in England.

Of course, it would probably have been a more authorative picture if it had been drawn twenty years ago before mobile phones and Internet communications became ubiquitous.