Far-right attack inevitable, warns informant who identified London nail bomber

Undercover agent who identified 1999 attacker says police are failing to keep pace with online spread of extreme ideology

An undercover informant who identified the man behind Britain's deadliest far-right attack has warned that a similar atrocity is inevitable due to the spread of extreme ideology online.

The mole, codenamed Arthur", told his handler, who then informed the police, that David Copeland was behind a series of attacks that killed three and injured more than 100 over a bombing campaign lasting less than two weeks in 1999.