Hi, I’m on this behalf of my dad, he’s just got his birth certificate today. He was born 1965 and born in hope hospital, his mother Margaret Mary Browne that’s all we know, does anyone know where to go from here
I realise your post was 2 years ago and you might by now have found your dad's birth mother/relatives, but for information, I was traced by my birth daughter born 1960 (with the help of her adoptive father who did a lot of the research). They looked in records for my name (having got my daughter's original birth certificate), then searched for marriages, then children of my marriage. Eventually they contacted one of our sons, just saying that they were distant relatives and doing family history research. My son gave them my address and I received a letter from my daughter, who I've met a few times since She found her birth father's family, living in Australia via DNA but sadly he'd died young but she has been in touch with her half siblings in Australia.
I know this isn't the recommended route as it's suggested that birth relatives are approached via 3rd party at first, as some birth mothers don't want to know the child they gave up for adoption. However, the first thing to do is a DNA, preferably with Ancestry as they have the largest database and see if you have any close matches. Also, if you've not got it, get your dad's adoption file.