Parker: wants to prime Corbyn on Middle Eastern, Russian and far-right activity

Jeremy Corbyn has been summoned for a personal briefing by the head of MI5 on the terrorist threat to Britain amid questions about his approach to national security.

Andrew Parker, the director-general of the Security Service, is expected to give the Labour leader a “full briefing” on the threat from Islamists in Britain and Isis jihadists returning from the Middle East to plot atrocities on home soil.

The MI5 boss also wants to prime Corbyn on the extent of hostile Russian espionage activity and the growing threat from far-right extremists.

Two senior government sources said the meeting was scheduled for Tuesday so that Corbyn could “begin to understand the facts of life” about threats he has a habit of playing down.

The Labour leader has…