Birth name was Karen Knights, adopted in Southampton 1972. Birth Mum name apparently Elizabeth Knights.

Hi everyone, I'm trying to help my mum find out more information about her birth parents! Not necessarily to meet up or form a relationship, but to discover if she has any siblings or there's any health issues! All we know is she was born November 1972, her birth mum is called Elizabeth Knights (may have re-married). She already had one child, then had my mum and put her up for adoption. She then went on and had more children. This all happened in Southampton UK. I have a photo of my Mum as a baby. Please if anyone can help... Thank you, Eve