FamilyTreeDNA have now updated the Big Y Block Tree to take account of the recent BigY-700 result from the Weaverham Clan. This is now clearly my closest match, with a new shared SNP FT268516. It would be nice to check if this SNP is shared by the Houghton clan, and even all branches of the Greater Hale Barns clan. Unfortunately it seems to be in a region that YSEQ cannot create a SNP test for.
I need to explore options. Meanwhile I’ve updated the Cheshire Group Haplotree.