Hay-on-Wye the north-easternmost tip of the Brecon Beacons National Park, just north of the Black Mountains. The town is just on the Welsh side of the border with Herefordshire, England, here defined by the Dulas Brook. Where the brook joins the River Wye just north of the town, the border continues northwards along the river. The Wye was the boundary between the former counties and districts of Radnorshire and Brecknockshire. The adjacent village of Cusop lies on the English side of the Dulas Brook. The nearest city is Hereford, county town of Herefordshire, some to the east. The Royal Mail depot
England and Wales framework and history. England and Wales England and Wales () is a legal jurisdiction covering England and Wales, two of the four nations of the United Kingdom. "England and Wales" forms the constitutional successor to the former Kingdom of England and follows a single legal system, known as English law. The devolved National Assembly for Wales () was created in 1999 by the Parliament of the United Kingdom under the Government of Wales Act 1998 and provides a degree of self-government in Wales. The powers of the Assembly were expanded by the Government of Wales Act 2006, which allows it