I have a good friend who was born in 1949 and had no idea till he was in his mid 30's that he was adopted. He was at the old family record centre killing time whilst a friend applied for his birth cert. So my pal looked in the indexes for his.........he wasn't there. He asked at the desk and was told he would have to have an interview with someone as it may be that he was adopted.
What a shock!!!
I have since found his birth family,although his mum had died a year before he went looking for her.
" Since 1975 adopted people in England, Wales and Northern Ireland have had the right to see their original birth certificate when they reach the age of 18 (in Scotland the age is 16 and this right has existed since legal adoption was first introduced)."