Well, phooey. I was hoping to fly SEA/LHR in BA first and then take the Concorde LHR/JFK. Pretty funny. I can fly SEA/LHR/SEA and it counts as 10,000 miles but SEA/LHR/JFK which is only 8,220 counts as over 10,000. Go figure.
So the sensible thing to do would be take the direct SEA/LHR/SEA but then I wouldn't have a Concorde experience. We'll probaly just do JFK/LHR/DUS/LHR/JFK and then switch to UA.
The 5 stopovers only work on QF flights.

Bummer.