keep well back until you can see that it is clear
If you want to overtake a long vehicle, stay well back so that you can get a better view of the road ahead. The closer you get the less you will be able to see of the road ahead. Be patient, overtaking calls for sound judgement. DON’T take a gamble, only overtake when you are certain that you can complete the manoeuvre safely.
B follow it closely and keep moving out to see the road ahead
C flash your headlights for the oncoming traffic to give way
D stay behind until the driver waves you past