Hi Z,
Many thanks, this does look a great possibility just come off FreeBMD and found 1861 was the year they got married, so this I think would be their first matrimonial home, but sadly I have also found that Frances died 5 years later in 1866 at the age of 29 and Joseph remarried in 1867 in Pontypridd. This may well be the reason cannot trace family in 1871, but it gives more information for searching.
Thanks again Retpara.