The exercises were Skyshield I and II. 8 Vulcans (4 each from 27Sq and 83Sq) penetrated US airpace. In the first game, 7 of the 8 evaded the defenders to reach the "targets". I don't remember the score in the re-match but reportedly the Vulcans could out-turn the F106s with ease during intercepts.
Aaaah, Vulcans !