Thankyou for the info I'm thinking the Ann Griffiths looks to be the right one as i already had Thomas & Sarah Ann's Baptisms, but not the mother's maiden name.
If that then means that William Roberts married Ann Griffiths on 6 Dec 1945, i need to re-check my 1851 census for William has i have him listed as single & living with his parents at 89 Joys Green.
Thanks again for the help