Police are treating the latest arson attack in north-west London as an antisemitic hate crime. Members of the Jewish community have been urged to “remain calm” as counter-terror police investigate it alongside a series of similar incidents. There have been “online claims of responsibility” for the arson and attempted arson attacks, said the Metropolitan Police, which is supporting Counter Terrorism Policing (CTP) London’s investigation. A man was spotted on Friday evening approaching a row of shops carrying a plastic bag later found to contain three bottles of fluid, it added. He placed the bag by a building in Hendon, Barnet,...