Religious leader Mohammad Saleem Akhtar said that although he supported the right for free speech, he felt the EDL demonstration was a "waste of time".
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Ms Leadsom has received the backing of Ian Duncan Smith, the former work and pensions secretary.
"This was mindless vandalism at its very worst, which has wrecked a much-loved community facility."
Three people have been taken to hospital after a taxi collided with pedestrians and a lamppost this afternoon.