The Education Secretary has called the findings of Peter Clarke's report on the 'Trojan Horse' plots in Birmingham schools "disturbing".
Nicky Morgan told MPs there was "compelling evidence" that hardline Muslims had tried to gain control of the governing bodies of a small number of schools.
She said there was a "clear account" that people in authority had "not promoted fundamental British values and had failed to challenge the extremist views of others".
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The Labour leader did not say whether he would maintain Britain's nuclear deterrent programme.
Ukip leader Paul Nuttall also said he would want to get rid of Sharia courts.
Over 40,000 people picked up their packs to take part in the annual marathon in the capital.