'Sonic boom' heard in Northamptonshire
An explosion sounding like a 'sonic boom', which occurs when a plane breaks the sound barrier, has been heard over Northamptonshire.
Military jet intercepting civilian aircraft caused sonic boom
The sonic boom was caused by a military jet intercepting an unresponsive civilian aircraft.
An RAF spokesperson said: “Quick reaction alert Typhoon aircraft were launched today from RAF Coningsby to identify an unresponsive civilian aircraft.
"Communications were re-established and the aircraft has been safely escorted to Cardiff airport.”
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