I would assume hospital records will still hold details of your birth but whether they would give details directly to you I am not sure, I wanted hospital records for 1942 and I had to send my birth certificate and my parents marriage certificate, I was a twin and they would only give details of me, not my brother
If you look at your registered birth you can double check your mother's maiden name, see what you think, don't know what date
I have no idea what the CR283 means
Louisa Maud