Terrifying newly released surveillance footage shows the moment the UK mass train stabbing suspect stormed into a barbershop armed with a huge knife — just one day before he allegedly carried out his bloody rampage on a London-bound train.

British police said a 32-year-old British man was on Monday charged with 10 counts of attempted murder over a knife attack on a train on Saturday.

U.K. police said Sunday that two people remain in a life-threatening condition following a mass stabbing on a London-bound train the previous evening. Authorities added that there was "nothing to suggest" the attack was a terrorist incident.

A survivor of the UK train mass stabbing has described how she begged for her life, and the madman attacker told her “the devil’s not going to win.”