Thanks for all your detailed replies!

So ironically, it could be that the last fixed wing movement was actually a Russian TU-154 at Greenham Common!! 😉

I don’t know if it was the last fixed wing movement as I probably would have missed landings/take offs when I was at work but certainly TU 154 CCCP85566 would have been one of the last fixed wing movements. As you say, quite ironic when you consider what the purpose of the base was. 😀