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Maybe I'm being a bit slow, but having read and re-read your post, I'm still not sure quite what or who you're upset with.
I can see a connection between IAT and the original subject of ATCOs working at units other than their normal place of employment, but am I not correct in assuming that NATS are well aware of this activity? It's hardly a secret - they even publish it in "Not Airway" or whatever the propaganda sheet is called this week.
What was the bit about slots and IAT about, though? That had me really mystified. Please explain.
NN