If you are overtaking, you must pass on the left at a safe distance and do not _______ until the way is clear from the overtaken vehicle.

When overtaking another vehicle, it is crucial to maintain safety for both yourself and the vehicle you are passing. After overtaking, the appropriate action is to return to your original lane only when it is clear and safe to do so. This means you need to ensure that there is sufficient space ahead of the vehicle you have just passed so that no sudden movements or hazards occur while merging back.

Returning to the lane prematurely can lead to dangerous situations, such as cutting off the vehicle you've overtaken or colliding with it if it is still too close. This is why it’s emphasized that you should not return to the lane until you have made sure it is clear of any obstacles or vehicles.

Ensuring that the way is clear is a crucial aspect of safe driving practices, which reduces the risk of accidents while overtaking.