He elaborates in the letter that words used to describe people are essential to their gender identity and language can often inflict symbolic violence on transgender litigants and lawyers in court, leading to psychological distress.
“Use of correct pronouns in orders and judgements of the Court will affirm identities and challenge discriminatory attitudes, which, as your lordship will be well aware, is heightened when the subject of these attitudes is queer. The wrong pronouns in orders and judgements can disempower, demean, and reinforce exclusion.”
Source: Barandbench