New York to London on Concorde - then to Paris, or Germany, or Scandinavia etc is all part of the same 125,000 QF point deal under the 10,000 mile cap - round trip. And this includes VERY EXPENSIVE to get to places like Leningrad, Istanbul, Madrid, Oslo, Athens or Moscow - even to North Africa and Casablanca or Marrakech etc, etc as far as I could determine. Hundreds of choices. OR for European residents, or anyone visiting Europe, you can do it in REVERSE. i.e. pick virtually ANY city if Europe to commence from, fly from there to London, then on the Concorde across to New York, and return to original gain.
Remember from LHR you are on the BA sardine class planes. I flew this week LHR-AMS in a 737 that had THIRTY folks in "Business" class. What a joke in a 737. (United flies EIGHT.) 3 abreast on RH side, with no more room or pitch than a coach seat from what I cold see.
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~ Glen ~