How is "Andrew", who by the way has a very distictive voice and will be recognised by all his colleagues, a whistleblower? He showed you a NATS report that they commisioned to give more information in to a trend that they had noticed and were doing things about. They have continued to do things to improve the safety environment and this news item is in effect along the lines of "NATS safety were doing their job and have continued to do their job in maintaining the safety around Heathrow."
And just how many incidents were AIRPROX?