Self flying 1-11
I do remember the BCAL 1-11 doing braking trials at LGW into wind and with only an engineer at the controls. The one pilot had decided to take a seat in the pax cabin.
The aircraft took off and it was only a desperate scramble by the pilot back into the cockpit, which saved the day.
I heard but am not certain of the truth that the a/c ran out of fuel on the landing run.