A deed poll is as available to non-binary people as to anyone else in the UK. You can use a deed poll to change your first name, middle name, last name, or any combination — and you can also use it to formalise a change of title, such as adopting Mx in place of Mr, Mrs, or Miss. The deed poll itself does not need to reference your gender at all; it simply records the name you are abandoning and the name you intend to use from that point forward.
One important thing to understand is that a deed poll operates independently of any gender marker on official documents. Changing your name does not change your gender marker with the Passport Office, DVLA, HMRC, or any other organisation. If you want to update a gender marker, that is a separate process for each organisation, and in the case of a birth certificate, currently requires a Gender Recognition Certificate (which only recognises binary genders under UK law as of 2025). A name change, however, has no such restriction.
Many non-binary people find a deed poll useful precisely because it is clean and uncomplicated. You are not required to explain your reasons, provide medical evidence, or wait for any approval. You fill in your current name and your new name, print, sign, and the document is valid. This service will generate a correctly worded deed poll that is accepted across the UK.