The England–Wales border (Welsh: Y ffin rhwng Cymru a Lloegr; shortened: Ffin Cymru a Lloegr), sometimes referred to as the Wales–England border or the Anglo–Welsh border, runs for 160 miles (260 km) from the Dee estuary, in the north, to the Severn estuary in the south, separating England and Wales.. It has followed broadly the same line since the 8th century, and in part …