PASSWORD SETTING PROBLEM FIXED – WE HOPE!
This problem has now been diagnosed and sorted, we believe, by our hard working website developer. Seems it was caused by a WordPress software update. If anyone now has a similar problem with setting passwords (and assuming you are following the guidelines on choice of passwords) then please let me know via Contact page/Website Admin, detailing what device/operating system/browser you are using.
Thank you all for your patience (well, most of you, anyway!).