Crikey, didnt realise controllers were in such a minority compared to these 'desk munchers'- could there only be about 1000 valid controllers in Nats then? Im thinking take a roster for say Blue watch (TC) at Swanwick comprising of say around 70 ATCO's, multipy that by the no. of watches for the cycle- thats about 300 controllers for Terminal control. Then double it for the no. of Area controllers so 600 staff at Swanwick. So the remainder must be dotted around the country at airports and Prestwick. A select few!