An appeal court hearing was delayed 11 minutes yesterday when a door leading from the cells to the dock jammed. Six prison officers struggled to open the door so Wong Chi-yung, serving 18 years for helping a suspect escape, could enter court. They eventually gave up and led him in through the public gallery. Wong, a former policeman, claimed his defence had been bungled because his barrister, Andrew Kan, was suffering from a mid-life crisis during the trial in March 1994. He argued Mr Kan ran a defence directly contrary to his instructions, which Mr Kan denied. Yesterday the court ruled against Wong on this point. Mr Justice Gerald Nazareth said the judges preferred Mr Kan's evidence to that of other witnesses. The appeal continues on other grounds in September.