A police officer at the Trafalgar Square Thatcher protests has been captured on camera telling members of the public that the crowd had been infiltrated by Millwall football fans.
The officer goes on to say that the fans had been causing fights and were throwing bottles - earlier reported to be filled with urine.
Moments later, people are seen throwing bottles at the police and the crowd.
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The pair have found solace through their relatives and their faith in the years since their daughter Madeleine went missing.
The youngster went missing from a holiday apartment in Praia da Luz in southern Portugal in May 2007.
Her parents Kate and Gerry said they will “never give up hope” of finding their daughter alive