Met Police deployed horses in crowded, wet streets during a protest.Today's protests were overwhelming peaceful for much of the day, with a drumming band entertaining the crowds at one stage.But later in the evening, the mood changed, with bottles and other missiles being thrown at the police guarding the entrance to Downing Street.Photographs showed the officer being treated as they lay injured on the pavement, while other images showed bikes being thrown at horses.The clashes followed a series of marches and demonstrations through London, including outside the US Embassy, in protest against police brutality following the death of George Floyd in Minneapolis.The London protest was carried out peacefully for much of Saturday afternoon, but.