The
England–Wales border is the border between
Wales and England in the United Kingdom. It runs for
257 km (160 miles) from the
Dee estuary, in the north, to the
Severn estuary in the south. It has followed broadly the same line since the 8th century, and in part that of
Offa's Dyke; the modern boundary was fixed in 1536, when the former
marcher lordships which occupied the border area were abolished and new
county boundaries were created.