westie,
126.82 - I assume 3-4 mile seperation in non low vis conditions is the minimum seperation? so any speed violations by pilots will cause a delaying in the approach. Also in these days of upgraded TCAS, just how helpful is a constant a/c speed readout to you? So do you sometimes feel you want to issue some a/c with a 'ticket' who obviously ignore you?
All the major London airports will use 2.5nm as a minimum separation on final approach when the wx is suitable and there are no wake vortex considerations.
That's obviously fairly close and it requires quite fine tuning from the ATC perspective and it doesn't take much non-compliance from the cockpit for it to reduce below 2.5nm. If it reduces to less than 2nm as happens occasionaly (not always our own fault!) we get suspended and go through the no tea and biscuits routine
