The court was told that a neighbour heard a car revving outside her home. She looked and saw a man who got out of the driver’s side of a car and went into the passenger side. “The accused appeared unsteady on his feet and had slowed, slurred speech.”Watson told the police that he had not been drinking, but admitted to having taken ketamine. There is not a "zero" legal driving limit for ketamine - or most other drugs - primarily to avoid punishing drivers for accidental exposure or, in the case of medicinal drugs, the presence of trace amounts from legitimate prescriptions. The sheriff disqualified Watson from holding or obtaining a driving licence for 12 months and imposed a £400 fine.