The "Reds and Greens" were the brainchild of one Arthur Ruffell, who served as a controller and went on to become SATCO in the 1950s.
I recall visiting the US in th 60s and hearing controllers rave over Heathrow's reds and greens... and they were very good, except when they went wrong. (Probably all sorted nowadays!)
Last edited by HEATHROW DIRECTOR; 15th February 2005 at 10:48.