In the late 60s I was flying Lightnings from Wattisham. One day, on QRA, we were prebriefed that were going to be launched to fly underneath an Aeroflot liner (TU134 or could have been a 104) to block the view from the glazed bit under the nose. Int knew the aircraft was going to deviate from the flight plan and overfly East Anglian bases. It happened.