The last time I saw a Belslow was at Dakar on 29 May 2002. It was parked right next to our almost-as-ancient VC10C1K XV102. It took off and set course northwards at a sedate pace; we refuelled and took off a while later to hear it chugging along at FL160 still well south of Tenerife...
It took us 5:30 to get back to Brize - lord knows how long it took the Belslow to reach its destination!