There's some info on the following page, it's likely they'll be applying for SC-level clearance for you intially:http://www.mod.uk/DefenceInternet/AboutDefence/WhatWeDo/SecurityandIntelligence/DVA/DefenceVettingAgencyFrequentlyAskedQuestionsTheVettingProcess.htmLooks like it depends whether your application is 'Routine', 'Priority' etc.From my experience a 'Routine' SC level application takes a couple of months minimum. Contact CSC HR if you're worried about it.
