Ellis, who celebrates her birthday on Sunday, was six-under par for the 36-hole strokeplay event with rounds of 68, 70. She was six shots ahead of the joint runners-up, Holly Clyburn and Tilly Holder.
This was the Sunningdale player s second win in a top scratch event this season, following her earlier success in the Hampshire Rose.
Leading scores
Par 72, CSS 73, 73
138 Ellis Keenan (Sunningdale) 68 70.
144 Holly Clyburn (Woodhall Spa) 72 72, Tilly Holder (Woburn) 72 72.
146 Lisa Ball (Matfen Hall) 74 72, Claire Aitken (Mid Kent) 72 74, Sian James (Bristol & Clifton) 70 76.
147 Hannah Coles (Maxstoke Park) 77 70, Abbey Gittings (Walmley) 74 73.
148 Harriet Key (South Herts) 71 77.
149 Becky Harries (Haverfordwest) 77 72, Hannah Grant (Enmore Park) 75 74, Tracey Boyes (Meon Valley) 74 75.
151 Kym Larratt (Kibworth) 76 75, Lisa Barton (Coventry) 75 76, Lucy Gould (Bargoed) 74 77.
152 Samantha Birks (Wolstanton) 75 77, Emilee Taylor (Gainsborough) 75 77.
153 Anna Carling (Vale of Glamorgan) 75 78.
154 Harriet Owers-Bradley (Wollaton Park) 80 74, Charlotte Dalton (Ladbrook Park) 75 79, Kirsty Rands (Burhill) 73 81.
157 Charlie Douglass (Brocket Hall) 81 76, Fern Grimshaw (Weymouth) 81 76, Becky Dowell (Enmore Park) 80 77, Jo Hodge (Knowle) 78 79, Charlotte Field (Harpenden) 77 80.
158 Hannah Turland (Tidworth Garrison) 79 79, Jo Nicolson (Wrexham) 77 81, Elizabeth Mallett (Sutton Coldfield) 77 81, Bronwyn Davies (Wolstanton) 76 82.
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