Unfortunately, the Kingston connection seems like a red herring, but I'll be keeping it in mind. Have been looking for the death of a Mary Hudson to see if it was likely that Mary Hudson/Alt died & John Hudson married an Ann. The only one I can find in the area is a Mary Hudson who died in Plumtree, Notts in 1801.....the same year that William, son of John & Ann, was baptised.....so that seems a bit late & Mary could have been of any age.
I suppose what I really need to do is get to the archives/look for gravestones, but, as I'm in Germany, that's not really on. I've been told that I should order the films, because sometimes baptisms are burials are tied up, but the Hudsons seem to be wandering all around the Notts/Leics borders.
All suggestions gratefully accepted