International Justice - Travelling To Court

In the UK a trial is cancelled. One party was told the wrong dates so the case was dismissed.
What happens in a case where the woman doesn't turn up because she is missing or dead and the accused is let free to attack again? In a recent case, I think in the USA, the courts used a video of the missing presumed dead woman's accusation because although she was not around it was 'in the public interest'. In many cases the woman or girl or child - or man - is scared or can't to through with a trial. In Singapore they have video links. If the person needed is in another country this saves the cost of flying them in.
What happens on days when the planes and trains and buses aren't running or bad weather? You would not cancel the trail - justice stopped by bad weather and typos.
You could even have a phone-in. Can't the judge or court phone the missing person and ask, 'where are you?, put the phone on speaker, then later have the person turn up in court when traffic allows.