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Police gearing up: http://yfrog.com/j2zsj0j
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Horse mounted police protect the Parliament: http://yfrog.com/5htpq0j
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Police have kettled hundreds of protesters in Whitehall: http://yfrog.com/b7f9z0j
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Three police helicopters circling Westminster – what's happening? http://yfrog.com/hq295xnj