"New Rule 72
Road positioning.
When riding on the roads, there are two basic road positions you should adopt, depending on the situation.
1. Ride in the centre of your lane, to make yourself as clearly visible as possible, in the following situations:
• on quiet roads or streets – if a faster vehicle comes up behind you, move to the left to enable them to overtake, if you can do so safely
• in slower-moving traffic - when the traffic around you starts to flow more freely, move over to the left if you can do so safely so that faster vehicles behind you can overtake
• at the approach to junctions or road narrowings where it would be unsafe for drivers to overtake you"