I helped my sister in law find her birth family some time ago, although we knew her birth mothers name we knew nothing else. Social Services gave us a copy of her original birth certificate, lucky for us she was born in the family house, named on the cert, I rang directory enquiries and the grandparents still lived in the house! We struck lucky but I would suggest getting in contact with Social Services as they can also help to act as an intermediary if necessary, I hope you find what you are looking for, it is important.