Should you in this situation keep a safe distance of at least 1m from the vehicle when overtaking it?

The Road Traffic Regulations require a distance of not less than 1 metre to be maintained exclusively when overtaking a bicycle, a bicycle trailer, a moped, a motorcycle, or a column of pedestrians. In the presented situation, a bus is being overtaken, and therefore this specific provision does not apply. A safe distance must of course be maintained; however, in this instance, it is not defined by a specific value.