Maybe he went on strike... won't come out of his cell, won't follow Barristers instructions, won't give his Barrister instructions, won't table his Notification of Alibi, won't put his shoes on. won't shave, won't won't .. and so on. All these things are just as possible as him turning up for his zoom, showered, shaved, haircut, dressed, tie, shirt, with all his paperwork. .. 
