Organisers say 'immediate action' needed by the UK Government to end 'brutal' violence against Palestinians Demonstrators descended on Hyde Park near Marble Arch to begin a March at midday on Saturday A video showed that some of the protesters clashed with police, throwing drinks towards officers Nine officers were injured during the protests, and nine people were arrested, the Metropolitan Police said Huge crowds of demonstrators scaled buildings, and climbed on top of the gates of Kensington palace Former Labour leader Jeremy Corbyn, Diane Abbott and Zarah Sultana are among those giving talks Thousands of Palestinians have been forced to flee their homes after a week of sustained conflict