Another observation although you wouldn't have seen it on FR24
RAF Tristar ZD952 was heading up this way at around FL280 yesterday. Thought I'd take a look out to watch it go by. Then it started to descend like a high speed lift going down. BY the time it got here any chance of seeing it had gone. It ended up going in to Manchester but that was hardly a typical airline descent profile.
Maybe they suddenly decided to pop in to Manchester for ice cream.









