You will be asked to stop on the right-hand side of the road, reverse back roughly two car lengths, and then rejoin the traffic flow. This tests three separate skills: choosing a safe stopping point, maintaining control while reversing, and carrying out proper observations before moving off again.
Pick a place that is both safe and legal. Avoid stopping near junctions, bus stops, private driveways, or anywhere you would obstruct traffic. Signal right, check your mirrors and right blind spot, and pull in smoothly. Aim to finish parallel to the kerb, around 30cm away, then apply the handbrake.
Before reversing, look all around the car: pay special attention behind and to your left for cyclists and pedestrians. Look over your left shoulder and begin reversing extremely slowly. Make small steering corrections to keep the car straight. Reverse about two car lengths or until the examiner tells you to stop.
To move off again, check your mirrors, signal left, check your left blind spot, and pull out when the road is clear. The examiner is checking that you do not rush the observations and that you only rejoin traffic when it is safe to do so.

