This is what we have in the Wiki:
United Kingdom
Changing your name legally in the United Kingdom is a relatively easy process and can be done in a number of ways. Firstly you need to prove who you currently are, by supplying an up to date passport, drivers licence as proof of identity and then two utility bills, bank statements to provide proof of address.
The two ways to change your name are either by Deed Poll or Statutory Declaration, both are legally accepted by any agency or government body in changing other relevant documents (such as new passports, driving licence). There are a number of online companies that specialize in providing documentation, which is legally accepted under UK law. These are generally cheaper, but take longer and any mistakes are not easily rectified.
These need to be completed, witnessed and signed in the presence of a solicitor, magistrate or commissioner for oaths as you are then signing to say you revoke your previous name and will only use your new name in all circumstances. Once changed it is an offence (Fraud) to use your previous name. The service will cost approximately 50 GBP.
You will be provided with an original copy and it is always best to get a number (up to 5) certified copies of the original. Depending on what Government Department or Private company you are dealing with, you will be asked to provide the original (required for a passport) or certified copies. Having a number of these enables you to send off many name change requests at a time, remember to always request they be sent back.
https://www.susans.org/wiki/Changing_legal_nameHere's a thread:
https://www.susans.org/forums/index.php/topic,85791.0.htmlHope this helps, hugs, Devlyn