Traffic Lights

Red Light
RED
Stop. Wait behind the stop line
 
Red and Amber Light
RED AND AMBER
also means Stop.
 
Green Light
GREEN
You may go if it is safe to do so. Take special care if you mean to turn left or right and give way to pedestrians who are crossing.
 
Green Arrow
GREEN ARROW
you can go in the direction shown if it is safe to do so. You can do this whatever other lights are showing
 
Amber Light
AMBER
also means Stop.
 
Amber Flashing Light
FLASHING AMBER
means you must give way to pedestrians on the crossings, but can continue if there is nobody on the crossing