Originally Posted by
Heliomance
It is so much easier in England. To legally change your name, you have to... start using a different name. That's it.
Various places may want proof of your name change, in which case you need to write a declaration, sign it, and get it witnessed by two people. There is no Central place you have to register it with, and it's up to you to inform everywhere that needs to know of your new name. Most places will also change your title on request (though not all - I think the department for work and pensions has me on file as Mr Tamsin <last name>).