River Lugg River Lugg The River Lugg () rises near Llangynllo, Powys. It flows through the border town of Presteigne, Wales then through Herefordshire, England, to the south of Leominster where it meets a tributary, the River Arrow. Its confluence with the River Wye is at Mordiford, downstream of Hereford and from its source. Below Leominster the river was made navigable under the "River Wye & Lugg Navigation Act 1696" for improving the River Wye, and had pound locks. Despite several attempts to improve it, including making flash locks against bridges, the river was probably never a satisfactory navigation. Commercial navigation probably
England–Wales border Shrewsbury, and Hugh d'Avranches at Chester, creating a new expansionist earldom in each case. In the Domesday Book of 1086, Norman lands are recorded west of the Wye at Chepstow and Caldicot in the Gwent Levels (); over the whole of north east Wales as far west as the River Clwyd, an area known to the Welsh as the "Perfeddwlad"; and west of Offa's Dyke, especially in Powys where a new castle was named, after its lord, Montgomery. Domesday Book no doubt records the extent of English penetration into Wales. This suggests that Offa's Dyke still approximately represented the boundary