I recall that the original appearance of the Avro Type 698 at Farnborough was September 2nd 1952 with Roly Falk flying it solo, and with an orange coloured Avro 707A off one wing tip, and off the other flank was a blue Avro 707B.
This was the star of the show which sadly was marred by the spectacular crash on Saturday September 6th of the DH-110 prototype, and the death of John Derry and Tony Richards, plus 27 spectators.
The name Vulcan was adopted in December 1952.