I seem to remember a TV programme from a few years ago (poss in the 90s?) which discussed some of the events surrounding the crash.
The program revealed that the French (poss?) were very keen to see how the canards affected the flight of Concordski at low-level and low speed, and on the day of the incident a French AF Mirage was operating in the area trying to film their use. There was some speculation (in the prog) that the Tu144 crew were trying to avoid the Mirage and 'over-avoided' causing the departure from controlled flight and break-up.
Oddly enough, I know the Goussaineville area reasonably well, but I was unable to reconcile the footage with how I know the area now. Is there an official BEA report for the crash which shows where it came down?