@NBGAF I am so very sorry to hear about your experiences.
I believe you can put father unknown on the birth certificate and so there is no legal record.
You can talk to someone at the hospital about the registering of the birth.
"Other people who can register a birth
If the parents can’t register the birth (eg for medical reasons), certain other people can do it:
someone who was present at the birth
someone who is responsible for the child
a member of the administrative staff at the hospital where the child was born"
www.gov.uk/register-birth/who-can-register-a-birth
@BPG20 Wise words about being part of a family with other children. We have a birth daughter and an adopted son.
However when you say..."If there is no contact, the baby will grow up feeling ashamed and rejected." I really don't agree. I do not think you can project this onto any child. Even if you know someone who has had that experience - either as an adopted child or an adopter.
My son is adopted. We receive letters from the birth parents to keep us informed, we do not show them to our son (in case they stop) but drip feed in bits of info. I definitely think that letter box is a good idea, but I don't think we can assume what a child will feel if letterbox is not in place.