The following rivers and lengths of rivers, that is to say—
(a) the rivers Ure, Soar, Wreake, Witham, Severn, and Weaver and the river Avon known as the Bristol Avon;
(b) that length of the river Aire which is below a line drawn across the river from a point on its south bank near Kippax Locks in the urban district of Rothwell in the county of York, West Riding, being the point on that bank which is at the north-east corner of the parcel of land numbered 7995 on the 1/2500 Ordnance Plan S.E. 4027 (Revised September 1959), to a point on its north bank immediately opposite the first-mentioned point;
(c) that length of the river Calder which is below a line drawn across the river from a point at the west end of the north side of the footbridge across the mouth of Choke Churl Beck in the urban district of Normanton in the county of York, West Riding to a point on the north bank of the river immediately opposite the first-mentioned point; and
(d) that length of the river Trent which is below a line drawn across the river 330 yards above the west side of Cavendish Bridge at Shardlow in the county of Derby, excluding, save as otherwise expressly provided by this Schedule, their artificial cuts and other connected watercourses.