The head of MI5 has said his agency has ‘one hell of a job’ to do as the threat from Islamic State has returned while Iran and Russia engage in intensifying efforts to undertake assassination and sabotage plots in the UK. In an annual speech, the Security Service director general, Ken McCallum, also accused Iran of being behind ‘plot after plot’ on British soil. He said Russia’s GRU military intelligence agency was engaged in ‘a sustained mission to generate mayhem on British and European streets’ and that there had been arson and sabotage plots
