So my mother had me in her late teens. She was a single Mum and never mentioned my biological fathers name in my birth certificate. I never met him. My surname was her maiden name. She moved me to another country (let’s say Spain) when I was 3. She remarried out there and duly started started putting his surname on anything that needed my details. She moved back to England when I was 7. When I came back I came back under my stepfathers name and have lived under said name until I married in my 20’s. She never however legally changed my name to my stepfathers. I received my national insurance number at 16 and the govt has assumed that this is my official name. I was taking to someone recently who suggested that maybe I left the country one person and that the government may think someone entirely different has come back. She never changed my name legally. Is there something iffy about that or is it totally fine. I ask because recently I have been asked to show proof of name change and my mother said “there is none.” Does that make my “maiden name” on my passport and on my marriage certificate incorrect. Help!!