Warbird Information Exchange

And this one doesn't look real to me for some reason

On 20 September 1958, a Rolls-Royce test pilot was authorised to fly VX770 on an engine performance sortie with a fly past at RAF Syerston Battle of Britain At Home display. The Vulcan flew along the main runway then started a roll to starboard and climbed slightly. During this roll the starboard wing disintegrated, resulting in a collapse of the main spar and wing structure. The Vulcan went into a dive with the starboard wing on fire and struck the ground. Three occupants of a controllers' caravan were killed by debris, all four of the Vulcan crew were also killed. The cause may have been pilot error; analysis of amateur cine film suggested the aircraft had flown over the airfield at 472–483 miles per hour (760–777 km/h) instead of the briefed 288–345 miles per hour (463–555 km/h); it had also descended to a height of 65–70 ft (20–21 m) instead of 200–300 ft (61–91 m). Rolling the Vulcan to starboard while flying at this speed imposed a load or stress of 2-3 g; it should have remained below 1.25 g. The VX770 was a prototype with construction and materials not to production standard, which was the primary reason for imposing low flight performance limits.[204][205][N 8]

^ Avro Chief Test Pilot Tony Blackman notes that when Avro display pilots carried out aerobatics, the displays were followed by a careful but little-known inspection of the inside of the wing's leading edge. Rolls-Royce pilots also carried out aerobatics, but Blackman speculates that Rolls-Royce did not know of the inspections, and VX770 may have already been severely structurally damaged.[206]