That's probably the one. VX770 was the first prototype ac, not a production model. Originally it had been fitted with 4xAvons of 6500 lb thrust each; on its final flight on 20 Sep 58 it was being used as a test bed fitted with 4xConways of 17500 lb thrust each (NOT Olympi!).
It was estimated that the ac was flying down the RW at 410-420 knots at 60 ft before it was pulled into a rolling pull-up at 2 to 3g.
The pilot had been briefed for a 2-300 ft flypast at 250-300 knots; the ac was limited to 380 knots and +2.25g in straight flight and half this g limit if aileron was applied.
In the event the pilot flew outside his brief and beyond the aircraft's limits. Neither the ac, the pilot, or the other 3 in the crew survived; from passing the tower to crashing on Syerston's RW25 threshold, killing 3 people on the ground in the process took 6 seconds.
(With acknowledgement to my first Vulcan captain, Andrew Brookes, for his detailed research on the subject.