Many thanks for all of the fantastic information.
This is going to get complicated

GAJ: The Jacob you list in 1841 is in fact the Jacob I am researching, though later in his life he was known as George and later Jacob George. I have the 1851 and 1861 records and I am fairly happy with those [even though in 61 the name was spelled Hemmings].
I am trying to tie him in with the 1881 record where he gives Ware as his place of birth. I have always assumed this to be Weare [not too far from Winscombe], and for some reason he was being less than truthful. If I am wrong, the next reliable information I have is his second marriage in Westbury, Wiltshire in 1884 which means he effectively disappeared for 23 years!
I'll keep digging.