Okay, in 1861 is Joseph and Betsy Carter have a lodger named George Carter, aged 22, b Paulton, who I think is NOT their son of almost similar age. That son must almost certainly be the one in Llangattock with his uncle George Hughes/Hew. Joseph Carter (b 1813) has a sister Ann Carter (b 1809) who has an illegitimate son named George, baptised 21 July 1839. Ann is living in Paulton in 1861 with her younger son William, and George is not there, but only a few doors away are Ann's brother Joseph with his wife Betsy, and lodger George. I think George is Ann's son.
Moreover, very nearby is living William Jordan and his family. William is the father of Elizabeth Jordan - who isn't actually present in 1861. However, the closeness of these family groupings suggest to me that William Jordan is about to become the father-in-law of lodger George, who is due to marry Elizabeth Jordan on 4 Sep 1862. The marriage register entry gives no father's name for George, unsurprisingly. Yes, he could be George the base-born son of Fanny Carter who is aged 2 in 1841 and 11 in 1851, but I'd say the evidence points to George son of Ann instead.
George son of Fanny is one of two Georges in this large contemporary group that I can't trace after 1851. The other is the son of John Carter and Amy Bull, born abt 1837/8. The rest are done and dusted I believe!
Let's try an upload. I've converted the spreadsheet into a pdf file which I hope will work.