A person who wants to change their legal gender can do this by obtaining a Gender Recognition Certificate.
If you are already married, you cannot get a Certificate without first ending your existing marriage. If you and your former spouse want to go on to form a Civil Partnership, you can do so as soon as the full Gender Recognition Certificate has been issued.
For more information about Gender Recognition, and how to register a Civil Partnership when one of you has acquired a different gender, visit the Gender Recognition Panel.
Updated: 6 June 2012