Ticehurst never saw the erroneous movement by keighley because we had a stupid SOP of writing down every clearance by EVERY pilot .......
IMHO jerry believed he had been ordered to retract the droop (instead of putting the reclearance in the box)....after Key made the order he would have turned to write the clearance down.
jerry, like myself, was taught that the stall system often malfunctioned and if the push went off then dump the system.
It is significant that none of our course were called to give evidence by the inquiry...
I have covered this in my autobiography...