According to the BBC , a passenger aircraft has been diverted to Prestwick Airport accompanied by RAF aircraft, due to a temporary loss of communication. The Royal Air Force said Typhoon jets were scrambled from RAF Coningsby and RAF Lossiemouth to identify an unresponsive civilian aircraft. Emergency services have arrived at the airport, and roads near the airport had been closed as a precaution, but later reopened. The aircraft was safely escorted to Prestwick.
It was a Volaris flight from Tolouse to Iceland. It was believed to be a delivery flight of the aircraft.
Source: BBC News