AI: "We demand access to monitor the trial."
UK: "You are free to monitor the trial as a member of the public."
AI: "No, we demand physical access and the right to a reserved seat to monitor the trial."
UK: "From the Crown's point of view, you are a public institution and have the same rank as any other public institution. The auditorium seating is ----> thataway."
This is not to say that AI having reserved seating to oversee the trial couldn't be useful, but it's understandable why the UK might choose not to treat them as a privileged observer.