Briefly use the hazard warning lights
The only time you are permitted to use your hazard warning lights while moving is if you are on a motorway or dual carriageway and you need to warn other road users, particularly those behind, of a hazard or obstruction ahead. Only use them long enough to ensure your warning has been seen.
B Switch on the hazard warning lights continuously
C Briefly use the rear fog lights
D Switch on the headlights continuously