"a few years ago -Did not some visiting aircraft ? (french) demolish the fence?"
I have unsuccessfully tried to find the photograph of a 50 Sqn Vulcan K2 tanker that could not retract its hose and dragged it through the fence at Waddington in the early 1980s. A Nimrod AEW also dragged its trailing radio aerial through the fence a few years later. The former was expected and the traffic lights set - I understand that the indications in the Nimrod were incorrect and the crew did not know that they had 150' of wire trailing behind them. The traffic lights may not have been set to red on this occasion.