Vehicles with flashing amber lights.
This is normally a warning of a slow-moving vehicle (such as a road gritter or recovery vehicle) or a vehicle which has broken down, so approach with caution.
Emergency vehicles use flashing blue, red or green lights, headlights and/or sirens.
Consider the route of the emergency vehicle and take appropriate action to let it pass. If necessary, pull to the side of the road and stop, but do not endanger other road users.
If it is necessary for you to slow down, stop or change position it is a developing hazard.