Shaggy Sheep Driver
...told by an ex-Concorde pilot that they lost the 'yellow' system just as they pulled up from the Red Arrows formation...
I don't quite understand why the Yellow system would have been in use at that point - and thus how they came to notice they had lost it!
I suppose the obvious inference is that they may have already experienced one of the several various problems or failures that caused Yellow system to auto-onload.
Best Regards
Bellerophon