Guide for witnesses:

witnesses giving evidence in trials should not be required to call an accused “she”, particularly if they knew the accused as a male.

Guide for judges:

the judge may decide not to use the trans person’s preferred name/pronouns to ensure a witness can give best evidence, eg a female rape victim may find it incomprehensible if the judge and others in court refer to her attacker as “she”.

Note that these instructions apply to accused people who have not yet been proven guilty.

Source: https://www.judiciary.uk/wp-content/uploads/2022/09/Equal-Treatment-Bench-Book.pdf

The intent here is absolutely clear:

Maya Forstater, chief executive of campaign group Sex Matters, told The Telegraph: “It’s a relief to see this recognition by the Judicial Office that sex always matters when referring to alleged perpetrators of violence and sexual assault, since these crimes are almost entirely committed by men.

https://www.telegraph.co.uk/news/2025/02/08/stop-using-trans-pronouns-in-sex-crime-cases-judges-told-uk/