Well, it falls under the Human Rights Act, so missgenderring would have to be argued to be part of discrimination based on 'gender identity or expression' to be handled through a human rights tribunal, which is generally limited to financial penalties (though refusing to pay could result in criminal court involvement). The good news is that the human rights tribunals no longer have a 100% conviction rate (too much publicity over certain cases in the early 2000s), and overreaches (like ordering an accused person's home seized and sold to pay the complainant) can get overturned by actual courts.
