I've looked into it, but it's losing years off my passport that's put me off. I have no middle name and a very common name and it drives me mad. I waited an extra year to see an orthodontist because they mixed my records up with another girl by the same name (and date of birth!!!) and when I finally got to seeing them, NHS had been changed and I was no longer eligible for treatment! I got a rejection from a job I really wanted, accepted a different one, only for them to ring apologizing they'd mixed two of us up and worst of all...I received someone else's breast op letter and when I rang the hospital to explain the mistake they thought I was in denial about my cancer! I had to take a bus to the hospital and sort the problem out in person!
So yes I want to change my god awful common name! Also, if any of you reading this ever have kids and a common surname for the love of god...give them a middle name!