have also posted this in chat
My dm remarried when I was young, I used my stepfathers's name although he never formally adopted me. This meant my birth certificate was different to the name I used so when I was 18 my dm arranged for me to sign a statutory declaration through her solicitors, I only got one copy and if any thing happened to it I would have no connection to my birth certificate especially as I am now married. How do go about getting some sort of copy?