Minor press ballcocks no 1276581: https://www.theguardian.com/world/2017/nov/17/aircraft-helicopter-midair-crash-buckinghamshire ATC at Wycombe Air Park being closed would be completely irrelevant; they wouldn't be being controlled out at Waddesdon anyway. Source: I've done literally thousands of flights from WAP in gliders and aeroplanes (and one helicopter flight).