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XR640 14 May 1969: While serving with 6 Flt, the aircraft[24] was involved in a mid-air collision during take-off at Chattendon Barracks, Rochester, Kent. The pilot of the Scout, and the two occupants of the Sioux, XT802 of 3 RTR Air Sqn, were killed. L/Cpl Sindall and Spr Pedley Royal Engineers were awarded the BEM for gallantry in attempting to rescue the occupants.[25]