In this situation, what must the driver of the green car do before starting to overtake?

1. 1Make sure that the driver of the grey car has not signalled an intention to turn (change lanes) to the left, and begin overtaking.
2. 2Give an audible warning signal to attract the attention of the driver of the vehicle travelling ahead and, without fail (immediately), begin overtaking.
3. 3Perform all the actions listed above.