What is developed vetting? The clearance check Peter Mandelson failed

There are a number of checks that you go through if you’re employed by the government. But the big two are security check, if you’re using secret material, and developed vetting, if you’re using lots of top secret material,” Matthew Savill, a former civil servant with experience of the vetting process, told Times Radio. Any official who needs access to top-secret material or simply works alongside people who do must undergo the security clearance, Savill, now director of military sciences at Royal United Services Institute, added.