The English-Welsh border, sometimes referred to as the Welsh–English border (or the Anglo-Welsh border), is the border between England and Wales, It runs for 160 miles (260 km) 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.

More information on the Wikipedia page English-Welsh border

Community content is available under CC-BY-SA unless otherwise noted.