By Chris Hughes Lone-wolf attacks against the UK are more likely in the wake of the concert hall massacre in Moscow, a former intelligence officer warns. The threat of violence is heightened after gunmen killed at least 130 people in an attack at the Russian capital’s Crocus City Hall venue on Friday. Islamic State Khorasan claimed responsibility for the attack and one ex-intelligence officer told the Daily Mirror: “This particular branch of Islamic State has proved to be resourceful and ruthless. “They appear to be trying new methods and will be actively trying to radicalise and talent-spot n…