M2dude, Biggles78,
Re the barrel roll : the French test pilot was Jean Franchi (now no longer with us).
He already had done it several times over the Pyrnees, until one day he was spotted doing it by a journalist, who had trouble believing what he saw, and phoned Arospatiale before phoning his newspaper.
As it happened, he was put through to André Turcat himself (then Director of Flight Test), who more or less said: "Mais non, Monsieur... A Concorde doing a roll? Not possible.... you must have confused another aircraft with Concorde". The journalist must have believed him, and the story wasn't published.
Afterwards, Turcat told Franchi that, from then on, he'd better do it out of sight of curious onlookers, like over the sea...
Story confirmed by Alain Franchi, his son, and also by Turcat himself during recent lectures.
Jean went on doing his barrel rolls, such as the one with Brian Walpole (who confirms in the documentary it was indeed Jean Franchi during his flight)..
Jean also did all the low-level flying with Sierra Charlie in the "Airport 79 - Concorde" movie. Ghastly film, story-wise, but since it was made before the days of CGI, most of the air-to-air is real, filmed from a specially equipped Lear Jet.
CJ