This is the moment police swooped on a gang of samurai sword-wielding teenagers suspected of carrying out dozens of robberies on the London Underground and trains. Detectives believed the six - all under 18 - are linked to 51 offences where mobile phones and luxury watches were snatched in just two months across east London.The Standard had been invited to join scores of officers - many in riot gear - as the family home of a 15-year-old boy was raided in Newham just before 3am.