Hi Paul
Thank you for your suggestion, which has worked for me in the past but now, even if I try to go to Ancestry.com, I don't get a choice of language or location at the bottom of the page, just a list of other sites such as Fold 3, Geneanet, etc.  When I have had this problem in the past it has eventually righted itself, so I'm living in hope that will happen again, as it's so frustrating not to have the most used British collections on the home page.  I rarely use Ancestry for my French research.
Regards
Judith