One person has been arrested in the lead-up to a pro-Palestinian march in central London. The arrest was made on suspicion of support for a proscribed organisation in relation to a placard ahead of the start of the march, the Met Police said. Between 200,000 and 250,000 people are expected to gather for the demonstration in central London, a spokesperson for the Palestine Solidarity Campaign said. It is set to begin at 1.30pm. Around 1,500 police officers from forces across the UK are on the streets of London, with the protesters going along Park Lane, Knightsbridge and Kensington Road, then...