You should follow the signs and road markings and get into the lane as directed. In congested road conditions do not change lanes unnecessarily. Merging in turn is recommended but only if safe and appropriate when vehicles are travelling at a very low speed, e.g. when approaching road works or a road traffic incident. It is not recommended at high speed.
Section: General rules, techniques and advice for all drivers and riders (rules 103 to 158) Subsection: Multi-lane carriageways (rules 133 to 143)All Highway Code Rules | My Saved Highway Code Rules