Rule 74 - The Highway Code

Turning. When approaching a junction on the left, watch out for vehicles turning in front of you, out of or into the side road. If you intend to turn left, check first for other cyclists or motorcyclists before signalling. Do not ride on the inside of vehicles signalling or slowing down to turn left.

If you are turning right, check the traffic to ensure it is safe, then signal and move to the centre of the road. Wait until there is a safe gap in the oncoming traffic and give a final look before completing the turn. It may be safer to wait on the left until there is a safe gap or to dismount and push your cycle across the road.

When turning into or out of a side road, you should give way to pedestrians crossing or waiting to cross (see Rule H2).