This picture portrays two generations of RAF airborne early warning aircraft flying together. The veteran Avro Shackleton AEW2, of which twelve were converted for No 8 Squadron at RAF Lossiemouth, served from January 1972 to 1991. It was replaced by the Boeing E-3D Sentry AEW1 which became fully operational with No 8 Squadron at RAF Waddington when the seventh and last aircraft was delivered in May I992.