...I hear calls for fairness from reasonable people that there should be no "trial by media" and that the process of law should decide guilt or innocence.

-It's too late. Its fairly obvious that the media trial has already taken place, the guilty verdict reached and that leaves virtually no chance that any kind of fair trial could take place after all this.
The state intelligence and propaganda institutions will be already celebrating in the wine bars of London with a wink and a laugh: "...The jobs done and its a good 'un" ...

What potential jury could ever pretend be free of prejudice when every prurient mainstream outlet has been pounding the public relentlessly with a salacious and quite poisonous drip feed of half fact and innuendo...all amplified by the megaphone of that treasured & trusted institution the BBC?

Brand is already toast.