I would doubt that they flash towards you as this could leave the police opern to the accusation of causing an accident.I think it is more likely that they track your rate of progress towards them by a seiries of infa red "shots" then snap yer rear plate as you pass. Also, the one that is on the parkway is possibly parked illegally, clearway - no stopping except in auth. places ie layby's.Ther is also one that parks on the pavement just down from city rd cem. This my also be breaking the law by blocking the pavement and this is an urban clearway with no parking or unloading restrictions in place. phew!