Red lights and advanced stop lines
Information from the Highway Code specifically for cyclists:
You MUST NOT cross the stop line when the traffic lights are red. Some junctions have an advanced stop line to enable you to wait and position yourself ahead of other traffic (see Rule 178 of the Highway Code).
Information for all road users:
When there is an advanced stop line at a junction motorists, including motorcyclists, MUST stop at the first white line reached if the lights are amber or red and should avoid blocking the way or encroaching on the marked area at other times, e.g. if the junction ahead is blocked. If a vehicle has proceeded over the first white line at the time that the signal goes red, it MUST stop at the second white line, even if the vehicle is in the marked area (Rule 178).
You MUST stop behind the white ‘Stop’ line across your side of the road unless the light is green. If the amber light appears you may go on only if you have already crossed the stop line or are so close to it that to stop might cause a collision (Rule 175).
You MUST NOT move forward over the white line when the red light is showing. Only go forward when the traffic lights are green if there is room for you to clear the junction safely or you are taking up a position to turn right. If the traffic lights are not working, treat the situation as you would an unmarked junction and proceed with great care (Rule 176).
Green filter arrow - This indicates a filter lane only. Do not enter that lane unless you want to go in the direction of the arrow. You may proceed in the direction of the green arrow when it, or the full green light shows (Rule 177).