England–Wales border point. In 926, Edward's successor Athelstan, "King of the English", summoned the Welsh kings including Hywel Dda of Deheubarth to a meeting at Hereford, and according to William of Malmesbury laid down the boundary between England and Wales, particularly the disputed southern stretch where he specified that the eastern bank of the Wye should form the boundary. By the mid-eleventh century, most of Wales had become united under the king of Gwynedd, Gruffudd ap Llywelyn. In 1055, he marched on Hereford and sacked the city. He also seized Morgannwg and the Kingdom of Gwent, together with substantial territories east of
Wye Valley the opening of the Severn Bridge (now part of the M48) in 1966. The Wye Valley Area of Outstanding Natural Beauty (AONB) was first designated in 1971. The designation indicates the importance of recognising and preserving the area's distinctive qualities, for the benefit of present and future generations. Administratively the area is very complex, being the only protected landscape to straddle the border between England and Wales. The Counties of Herefordshire, Monmouthshire and Gloucestershire are each in a different government region. Co-ordination of conservation across these political boundaries is undertaken by an AONB unit and Joint Advisory Committee. A Management