Harry Vaughan, an A* student from south east London, shared manuals on bomb making and how to kill people in extremist forums.

Any young person is susceptible to radicalisation online - particularly during lockdown.

If you're concerned, start here: https://t.co/38lSpt4cik pic.twitter.com/7pi9HAM98e

— Metropolitan Police (@metpoliceuk) November 3, 2020