They are, of course, to keep away from the platform edge.
Times, Sunday Times
She fell on the track — just missing the live rail — when he shoved her towards the platform edge.
The Sun
Train companies are being told to switch off diesel engines at the platform edge because of mounting concerns that passengers are being subjected to toxic fumes.
Times, Sunday Times
I was fiddling away at them and did not see the platform edge.
Times, Sunday Times
Some staged a mock fight next to the platform edge.
Times, Sunday Times