I support the existing English law - that you have the operation , hormones etc etc and then do the full legal gender change.
No medical treatment is required for a legal change of sex under current UK law.
www.channel4.com/news/factcheck/factcheck-rowling-right-that-hormones-or-surgery-not-required-for-legal-gender-change
But the Government Equalities Office, which oversees the process by which people can change their legal gender in the UK, told FactCheck today that: “You do not have to be taking hormones or planning to get surgery to get a GRC” and “it’s not in the legal requirements that someone be taking, or planning to take, hormones”.