Rule 109 - The Highway Code

Traffic light signals and traffic signs. You MUST obey all traffic light signals (see ‘Light signals controlling traffic’) and traffic signs giving orders, including temporary signals & signs (see ‘Traffic signs’). Make sure you know, understand and act on all other traffic and information signs and road markings (see ‘Traffic signs’, ‘Road markings’ and ‘Vehicle markings’).

Laws RTA 1988 sect 36 & TSRGD schedule 3 part 4, schedule 9 parts 7 and 8, schedule 14 parts 1 and 5, schedule 7 part 6, schedule 15 part 1