Exclusive: Adrian Fulford, who chaired the recent Southport inquiry, will also examine the wider national security vetting systemUK politics live – latest updatesA retired high court judge is expected to review Peter Mandelson’s vetting process and the wider national security vetting system.The review, commissioned by Downing Street, comes after a Guardian investigation revealing that security officials decided Mandelson should not receive developed vetting clearance, but were overruled by the F