British children are being advertised stab-proof vests for £50 on social media in a 'dangerous' new trend campaigners fear will put lives at risk, MailOnline can reveal.

Videos seemingly aimed at youths have appeared on TikTok and Snapchat in the past few weeks flogging body armour, with clips being viewed thousands of times.

It comes amid claims terrified teenagers fear being stabbed in schools or outside their homes as Britain's knife crime crisis continues to spiral out of control.

In one video, uncovered by MailOnline, youths wearing face masks and balaclavas are seen gathered around a Lamborghini Gallardo before showing off the stab vests.

In another, those advertising the defensive kit say they can protect children 'going out to collect milk for their mothers' as well as gangsters venturing into enemy territory.