Wikipedia,
Wrong.
In the UK, normal traffic lights follow this sequence: Red – Stop, do not proceed. Red and Amber – Get ready to proceed, but do not proceed yet. Green – Proceed if the intersection or crossing is clear; vehicles are not allowed to block the intersection or crossing.
Highway Code,
Green: You can go if it is safe to do so. Give way to any pedestrians who are crossing. Amber: Stop. If you have already crossed the stop line when the amber light appears or are positioned close to the stop line where stopping may be dangerous, you should proceed.