WARKWORTH CASTLE Occupying a position close to the River Coquet in Northumberland, Warkworth Castle originated as a mid 12th century motte castle. However, in the 13th century a new castle was begun with the construction of a gatehouse. Located at the centre of the south curtain wall, the gatehouse has survived with an archway and semi-octagonal projections on either side, although it does not stand to full height.