The longest nonstop Vulcan flight was by XH481 on 20th June 1961 from Scampton to Sydney. The flight took just over 20 hours.
The aircraft was "borrowed" by 617 squadron from 101 squadron for the flight as it had the best servicabilty record at the time. 101 squadron didn't know at the time why 617 squadron wanted that particular aircraft! My dad in particular was extremely pissed off as he was the crew chief of XH481... and anyone who knew my dad would understand why XH481 was such a good aircraft.
---Mik