Thanks Janet.
I hadn't been able to find a baptism record nor anything to do with Elizabeth Stay (or Day for that matter). I was hoping that in later dates that a birth record or baptismal record may come up for subsequent children but so far nothing.
It could be a possibility that he did change his name according to family rumour but unfortunately this has been difficult to clarify henceforth the brick wall I have reached. However open to any suggestions...I shall start tracing the Dickens line just in case.
Nicole.