RootsChat.Com

I was taken from my birth mother, Bridget T, imediately after I was born on 1940's and taken to Assisi House in Surrey. I was christened Francis Adrian apparently at the request of my future adopted parents and handed to them by the court when twelve weeks old. The Catholic Rescue Society wrote to my parents that the full adoption would not be legal until my first birthday in case my mother changed her mind 'but we knwo she won't'. I was born in Chiswick in what may have been a safe Catholic house but my mother had been moved to Arrarat Rd in west London by the following January. She disappears from all records after that. My 'brother' in my adopted family remembers going to Portsmouth to collect me and being told that my actual mother had come all the way from Ireland to give them her baby. The whole proceedure seems to have been some sort of early mail order/designer baby - date of birth, boy, named Francis Adrian etc.
I would love to find my birth mother's origins and family but all records of adoption prior to 1952 seem to have been destroyed. How do I proceed?