About Jan 84, just found out to be my last course on IOT staff, end of a "first Saturday" walkabout for the junior course. arrived at the layby to board the coaches when the first police car and fire engine arrived, followed by just about every fire appliance in Lincolnshire. Brant Broughton retained crew arrive 20 mins after everyone else. Turned out coach driver had been sitting in the coach in the layby with the engine running to keep him warm, a dirty injector meant the exhaust was a bit smoky, and a passing motorist went on CB (remember that) to tell the world that a bomb had gone off in an RAF bus..................