Interestingly, the 'concordesst' site has a photograph of G-AXDN under construction and I would think about 2 weeks from rollout where "British Aircraft Corporation" has been painted on but there is a big gap where "Sud Aviation/ Aerospatiale" should be. This would be in November/early December 1971 I think. Just maybe this was the time when the new French company were making up their mind how they would like to be known. I know they didn't like the simple use of company initials - Societe Nationale Industrie Aerospatiale if I remember correctly and one must admit that Aerospatiale sounds a whole lot nicer than SNIAS! Maybe Christiaan could comment?
CliveL