Thanks again, you've given me so much information. It's beginning to look as if William Philips was a child, before marriage, of Sarah Phillips - and either William Caldecott was his biological father anyway, or he became his father in practical terms after they married. Ebrington, Blockley and Chipping Campden are very close to each other, and not far from Ettington (Eatington).
My interest is in William Phillips' marriage to Harriett Wilkins. Harriett was my wife's granny's granny. I think I can be fairly sure of William's parentage from what you've all discovered for me, thanks, and I'd now like to find out when William died - my impression is that he was working away from home at the time of the 1851 census, but deceased by the time of the 1861 census. But there are so many deaths of that name listed on Familysearch and FreeBMD that it's hard to find the right one.
I'm so grateful for everyone's help, I always get to learn more when I try Rootschat with a problem.
Cheers,
Bill