Edinburgh Sheriff Court A PRESTONPANS driver who was caught behind the wheel while disqualified and unfit to drive through drink or drugs is facing a further lengthy road ban. Andrew Yorkston, of Park View, appeared at Edinburgh Sheriff Court last week to admit a series of driving offences. Yorkston pleaded guilty to driving while unfit to do so through drink or drugs at Newcraighall Road in Edinburgh on January 23 last year. He also admitted to a charge of driving a vehicle with no insurance that day. The 30-year-old also admitted to driving a vehicle with 409mg of benzoylecyonine in his system at Bankton Terrace in Prestonpans on January 28 last year. The legal limit is 50mg.