The Met has urged the organisers of an event that could see more than 1,000 people gather in central London this weekend in support of a terrorist organisation to call off their plans. Saturday’s planned event comes just days after a terrorist attack at a synagogue in Manchester that saw two people killed and others seriously injured. Commissioner Sir Mark Rowley said: "The horrific attack in Manchester has caused significant fear and concern in communities across the UK, including here in London. “It is for these reasons we have asked Defend our Juries to delay or cancel their protest this weekend. Following the attack in Manchester, that policing presence was increased further and will remain so through the weekend.