The 'other' Vulcan incident referred to might be 6 Apr 67 at Scampton. The crew, with an ATC cadet on board, was taking off and as the jet started to roll, there was a loud bang. The aircraft was stopped, engines were shutdown and all six vacated the aircraft which was completely gutted.
This accident was caused by No: 3 engine flame tube failed, turbine blades in No: 1 ruptured the fuel tanks and the rest was inevitable. The cab was XL385 of 27 Sqn.
Old Duffer