Peter Thompson, 41, collapsed in a corridor but was left on the floor untreated.

The father-of-one had passed out after going on a vodka binge. Staff had thought he was sleeping until a night manager discovered him “cold and stiff”.

A coroner yesterday slammed Manchester Mental Health and Social Care Trust after it emerged Mr Thompson could have survived if he had been taken to A&E.

Three nurses now face disciplinary action after an inquest jury in Manchester returned a verdict of misadventure contributed to by neglect.