This is the dramatic moment a man's life was was saved when a quick-thinking woman managed to stop a train from moving off after he fell through the gap.
She instantly raised the alarm with the stricken passenger, who had appeared to collapse and fall under an Overground train in east London, sure to be crushed.
With seconds to spare before the driver left the station, he narrowly avoided being run over by a train following the freak accident that saw him slip through the small space onto the tracks.