In this dual carriageway you overtake the vehicle with a trailer and you do not intend to overtake any other vehicle. Must you return to the right-hand lane?

When overtaking and driving in the left lane of a dual carriageway, once the overtaken vehicle has been passed, the driver must signal the lateral shift to the right and return to the right lane in a progressive and safe way, provided that this lane is free and traffic conditions allow it.

Under no circumstances should the driver swerve or make sudden movements to return to the right lane.