Think it was Warpole. Trubshaw would have told Andrew where to go.
Could be wrong though, I'll have to check again...
I agree airline pilots rolling aeroplanes are stupid idiots who may fiddle with kiddies when they get bored of fiddling with themselves. However, test pilots doing it is very different. Especially since Concorde was not overstressed or did not (unintentionally) exceed any parameter on the flight in question.