Air traffic controllers are under so much pressure to maximise the number of landings that passengers' safety is at risk, the BBC has been told.
A retired air traffic controller, who asked not to be named, said an "errant culture" at Heathrow focused on service provision, more than safety.
He described one incident over Reading last year as the most risky he had seen in 27 years of air traffic control.
A retired air traffic controller, who asked not to be named, said an "errant culture" at Heathrow focused on service provision, more than safety.
He described one incident over Reading last year as the most risky he had seen in 27 years of air traffic control.
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