I doubt there was ever more than 40 ac in the air at any time including helios and C130s. For those into X Plane you could even do the Black Buck raids with the Just Flight Vulcans at the appropriate time. Now that would be a long haul!
I'd love to simulate that with you real time! Would certainly be a challenge to nav using only ADF and VOR. Nonetheless, we could cheat and use the default GPS to load a fixed route and follow that of course.
I may even dabble with the idea of trying to fly a "Cross the Pond" VATSIM event with the Vulcan - just to see how much I can annoy all the controllers when I report the need for radar vectors for absolutely everything!