Two Royal Air Force Typhoon fighters were scrambled from RAF Coningsby in the evening of 2 May after CityJet Avro RJ85 EI-RJC (msn E2333), operating AF1558 from Paris Charles de Gaule to Newcastle, ceased responding to radio calls for some time. The two Typhoons went supersonic as they raced to intercept the RJ85, their sonic booms causing considerable concern in Yorkshire. The fighters eventually intercepted the RJ85 near Leeds. They led her out over the North Sea until communications were re-established, and then escorted her into Newcastle, where she landed at 22:20 local time. Air France later stated that the aircraft’s silence was due to a radio communication problem.