LUHE -
The initial ban on reporting by judge Geoffrey Marson was to ensure a fair trial.
The ban to stop media reporting Tommy Robinson's arrest was a follow on from that to ensure the same goal. Because in so doing - the Judge felt - his live streaming comments may have prejudiced the case.
The only person who can answer why in detail is the Judge in the case. Why don't you write to him and ask? A Judge has a lot of power. You need a court order in the middle of the night to ensure that doctors can treat a child or vulnerable adult and a Judge can so order.
Imagine that at the ARC there was a raving apostate who hated child abuse and made a scene at or outside the hearings. Imagine said apostate had a history of doing it.
I would have the utmost sympathy for him/her.
BUT if Judge McClellan thought the antics might intimidate witnesses to the case and had said to the court ushers - "keep him outside at a distance - he isn't helping this enquiry" and the apostate persisted then he would likely get removed. If he had a "history" he might get arrested. If he had a suspended sentence against him he might go to prison.