Police officers

Traffic approaching from the front
Traffic approaching from both front and behind
Traffic approaching from behind

From the side
From the front
From behind**In Wales, bilingual signs appear on emergency services vehicles and clothing
Arm signals to persons controlling traffic

I want to go straight on
I want to turn left; use either hand
I want to turn right
Driver and Vehicle Standards Agency officers and traffic officers

Traffic officer
DVSA officerThese officers now have new powers to stop/direct vehicles and will be using hand signals and lightsignals similar to those used by police. You MUST obey any signals given (see Rules 107 and 108).
School crossing patrols

Not ready to cross pedestrians
Barrier to stop pedestrians crossing
Ready to cross pedestrians, vehicles must be prepared to stop
All vehicles must stop