Hi Carol.
Yes we've had DNA tests and researched the family tree but found no links. As far as we know the father was named originally on the birth certificate but then his name was removed, we wonder if a new certificate was issued. apparently the birth father also assisted with the adoption, it seems that this was prearranged before my cousins birth, and the father knew the adoptive parents, who were,then in their early 50's. (1941). The only place I feel we can look is in hospital birth records for that year and that area.
Regards
anthony.