Yes if it is your surname. You do it by deedpole and you need a solicitor. I don't think you can change your given name other than by getting people to call you by the name you choose. But I think on legal documents etc you would have to use the original name. I hope that all makes sense.
however--depends wher u live--scottish law is different--u only have to let those who need to know what u wish to be know as from now on--provided u r not doing it for reasons of fraud or deceit or any other illegality--(unless the law in scotland has changed since i last looked at this--some time ago i admit)
you can do it by statutory declaration - go to the magistrates court, tell them you want to change your name, take your birth certificate (and another id?), fill in a form and swear an oath in front of a magistrate - all done!
I changed mine by Statutory declaration in the 70's but my solicitor didn't register it, so had an awful job proving who I was when I moved over here. Make sure it is registered.
timcapper is absolutely right. When you sign the statutory declaration in front of the magistrate (just ring the court to find out which days "Application Court" sits) you should attach the copy of the declaration to your birth certificate as the two become one document for all ID purposes.
hi there tonyapple i was wanting to change my surname recently but wasnt aware of cost etc so i went to the local citizens advice bureau and they changed it by staturoy decleration and it was free! ive since changed my name on my passport and driving licence with no problems