Up to 16 thousand off-duty police officers are set to march in the capital against cuts to the force. They'll don black caps for every police officer lost under the Government's budget cuts.
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The discovery of a body in the River Brent came during the biggest police investigation since the aftermath of the 7/7 bombings.
People living close to where Alice Gross went missing spoke today of their sadness after a body was found in the River Brent.
The mayor's pledge to the Tory conference was immediately condemned as 'pointless' by opponents.