Thank you Alan,
I have been searching more and I think the Ann/e who William married may have been Anne Rice, married in London in 1682. Parents of Benjamin Belcher baptism 7 Jul 1698 Wantage, Berkshire, England. Most of the trees that I've come across on Ancsty have Benjamin's parents as William Belcher and Ann Dew having married in either 1678 North Hinksey or 1683 East Hanney but I don't seem to be able to find anything to confirm this hence my earlier query.
The search continues. Many thanks for your message.
Kind regards, Kirst