A plain-English guide to CTC, the Counter Terrorist Check: who needs it, what it involves, how long it takes and how long it’s valid, and how it differs from SC.
CTC (Counter Terrorist Check) is a National Security Vetting level for roles near public figures or sensitive sites where the specific risk is terrorism, not for roles that handle classified information. It typically takes around 6 weeks, and covers a far broader range of jobs than most people expect, from policing and aviation security to catering and facilities staff at MOD sites.
What is CTC clearance, and who needs it?
CTC exists to check that someone doesn’t have connections to, or sympathies with, a terrorist organisation, and that they aren’t vulnerable to being pressured by one. It applies to roles with proximity to public figures assessed to be at particular risk, and to roles with access to premises, information or material that could be valuable to a terrorist. In practice that covers a wider mix of jobs than SC or DV: aviation and transport security, police officers and PCSOs, protective security roles, and administrative, catering, cleaning and other support staff at MOD sites and major public events, alongside more obviously security-focused roles.
What does a CTC check actually involve?
CTC builds on BPSS, so identity, right to work, criminal record and employment history are confirmed first. On top of that, CTC adds a check against UK security and counter-terrorism records, run by UK Security Vetting (UKSV). It’s deliberately narrower than SC: the Civil Aviation Authority, which sponsors CTC for aviation roles, is explicit that CTC “is not designed to manage access to sensitive information,” it’s a check against a specific risk, not a general trustworthiness assessment for handling classified material the way SC and DV are.
How long does CTC take, and how long is it valid?
Most sources put CTC processing at around 6 weeks, faster than SC and considerably faster than DV. Validity is less consistent across sources: some sponsors cite a 5-year renewal cycle, others report 10 years with periodic reviews in between, particularly in policing contexts. If you’re relying on an existing CTC clearance for a new role, check directly with your new sponsor rather than assuming a fixed figure, since the exact renewal period depends on the sponsoring organisation.
Are you eligible for CTC?
Candidates typically need to be at least 21 years old and have been resident in the UK for a minimum of 3 of the last 5 years, shorter than the residency requirements for SC or DV. As with other clearance levels, you don’t need to hold CTC before applying for a role that requires it, your employer sponsors you through the process once you have an offer.
How does CTC differ from SC?
The difference is purpose, not just depth. SC exists to confirm you can be trusted with material up to SECRET, and involves a broader look at your background, including finances and references. CTC exists to rule out a specific risk, terrorism, and is correspondingly narrower and faster. A role can require CTC without requiring SC, and vice versa, they’re not simply two points on the same ladder. See our guide to SC clearance for how that process compares, or our full overview of UK security clearance levels for how all five levels fit together.
Where to go next
For the check every clearance level builds on, see our guide to BPSS. For whether your specific role needs clearance at all, see do you need security clearance to work in defence?