Borough of Halton
1997–2010: The District of Vale Royal wards of Castle, Church, Forest, Frodsham East, Frodsham North West, Frodsham South, Gorst Wood, Hartford, Helsby Central, Helsby North, Helsby South and Alvanley Ward, Kingsley, Milton, Northwich, Weaver, Winnington, Witton North, and Witton South, and the Borough of Halton wards of Brookfields, Castlefields, Clough, Daresbury, Murdishaw, and Norton.