Britain’s security services have foiled 22 terror attacks on the UK in the past two years.
Police have arrested 266 people on suspicion of terrorism-related crimes within the past 12 months.
The figures were revealed by the Metropolitan Police’s head of counter terrorism Neil Basu on Monday as he welcomed an independent review of the nation’s Prevent strategy to wean extremists away from committing atrocities.
Since 1,700 people had gone through the system.
Mr Basu urged the strategy’s reviewer Lord Carlile to ignore its ‘malign detractors’ and experience the ‘amazing work’ being done to protect people vulnerable to radicalisation.
Seven of the 22 attacked foiled since the Westminster atrocity in March 2017 related to suspected right-wing extremism.
“Rather than just treat the symptoms of terrorism we must treat the causes,” he said.
“Prevent – which offers a bespoke programme of support for vulnerable individuals – is the closest thing to a public health solution we have.
“Evidence indicates people with extremist views are more likely to be moved to violence when they feel excluded.
“We need to help people who see their position in society as hopeless to find hope – help them find a ‘family’ that believes in society, not a gang that wants to tear it apart.’
Security minister Brandon Lewis said: “We have seen how Prevent has supported many vulnerable people, stopping them from hurting others and themselves, and helping them turn their lives around.
“Since 2012 over 1,700 people have received tailored support through our Channel programme with the vast majority leaving with no further CT concerns.
“We know Prevent works best when delivered in partnership with communities which is why we support community groups to deliver projects against all forms of radicalisation.
“Last year 181 community projects were delivered, reaching over 88,000 participants.
“More than half of these were delivered in schools, aimed at increasing young people’s resilience to terrorist and extremist ideologies.”