Concorde was built both by the French and the British from components made in both countries. This was quite an achievement at the time, given that the UK used imperial units and France used metric units - and the language barrier was pretty significant as well.
But the 'Anglo-French' agreement at least stopped any politicians from trying to cancel the programme.
The aircraft had such iconic status that it was never referred to as 'a' Concorde or 'the' Concorde, just as 'Concorde'.
ba's return to flight campaign had just started when the news came through about the 11 September World Trade Center outrage. At least 40 of Concorde's most regular passengers were murdered by Moslem terrorists and both ba and Air France struggled to find sufficient passengers to justify a regular service. As soon as ba announced that it was killing off Concorde, all remaining seats were snapped up.....
As Jock Lowe said, ba could have flown Concorde for another 20 years.
But some major marketing initiatives would have been needed to ensure that adequate revenue was generated.