I was also born in Scotland and that’s where I went to find my birth mother. It was actually quite simple. I contacted the birth registrar in Edinburgh http://www.gro-scotland.gov.uk/ and they sent me forms to fill out and had to send them my adoption certificate. with that they were able to get my birth certificate with my birth moms name o it and then it was pretty simple. It all depends on how much info she has
available ie if she updated her electoral lists etc….
The right to look for a birth parent is 100% up to the child (once they turn 18) in Scotland and the birth family cannot look or them.
Good luck to your friend., if you (or your friend) need ANY info please don’t hesitate to contact me