Just did Air Law exam (JAA)
On the ground:
Flashing Green: Clear to taxi
Steady Green: Clear Take off
Flashing Red: Taxi Clear of Landing area in use
Steady Red: Stop and give way
Flashing White: Return to starting point on the aerodrome.
In the Air:
Flashing Green: Return for Landing (not a clearance to land)
Steady Green: Clear to Land
Flashing Red: Aerodrome unsafe do not land
Steady Red: Give way and continue circling
Flashing White: Land at this Aerodrome and proceed to apron (clearances to land and taxi will follow this is not a clearance to either land or taxi)
Red Pyrotechnic : Notwithstanding any previous instructions do not land for the time being.
These instructions appear in exactly the same way in three separate books as well as on the question bank.