Monday morning I give them a ring and ask what they're playing at. I say that I'll not be able to attend as it's far too short notice. In return, the chap on the phone tells me that it's actually only a PTR - a Pre Trial Review. This isn't the trial itself, so it's not entirely necessary to attend. Indeed, I'd personally advise not attending PTRs as this is a good opportunity for the prosecution to sound out what your defence is going to be. I'm advised to fax a letter with wording to this effect.