As part of Wargames, with some flying in from Scotland, where only a few hundred ADC interceptors were part of the scenario, and not the full 1500 odd strength of ADC and State ANG units
That's cool and all, but Vulcans from Scotland aren't Bisons flying in from over the North Pole, or Beagles from Cuba, and BMEWS wasn't fully operational in 1960, as it would be in 1962, when Fylingdales was partially operational during the Crisis, and Alaska fully operational in 1961, and Thule in 1960, a few months after that exercise
Sky Shield I in 1960, had 360 interceptors part of the exercise
Sky Shield II in 1961 had 1800 fighters and interceptors, plus 250 Missile sites and full USN and ANG participation, unlike the year before