I’m sure there will be no European aerospace company that will want to take the responsibility as Design Authority for Concorde . A part of why BA and AF walked away was Airbus wanting to charge massive fees to continue supporting the aircraft. Second issue is that much of the avionics was designed before the word microprocessor entered the dictionary. The unique to Concorde avionics is impossible to source or repair. I would love to see her fly again like many other . Yes the Pol was lovely .