People with dual nationality
if you hold passports for another country, as well as your UK passport, then you must also change your name on your other passport before the UK Passport Agency will issue you with a new UK passport.
You may therefore need to ascertain the rules for changing your name in the country whose passport you wish to change.
Undischarged bankrupts.
If you have been subject to a bankruptcy order and that order has yet to be discharged, and you are either in a partnership, limited company or sole trader, you are required to notify all suppliers of your change of name.
You must also notify the official Receiver handling your bankruptcy. Failure to do so is a criminal offence.
Mental Health incapacity
If you have been detailed under The Mental health Act, there is nothing stopping you changing your name.
However, the Official Solicitor may apply to the court of protection for your change of name to be revoked if they believe you lacked the capacity to understand the decision you came to when you signed the deed poll.
People with a criminal conviction.
There is nothing to stop you changing your name by deed poll if you have a criminal conviction.
However if you do not notify the police or probation of the fact while you are still serving your sentence, this could be seen as a breach of your duty to provide all relevant information.
Residents of the United Kingdom who are not UK citizens.
If you are resident in the UK but are not a UK citizen, then you are able to change your name by deed poll in the same way a UK citizen can. However in order to satisfy the authorities in your hone country, you may need to follow different rules and should always check with them first as the legal procedure for your home country.
Some countries will require your deed poll to be witnessed by a solicitor or notary public. Other countries may require an apostille to be attached to the document.
Please check with your Embassy or Consulate before proceeding to change your name.