Units within OSCT responsible for access to communications data are the National Communications Data Service (NCDS) and Communications Capabilities Unit (CCU).
The Intelligence and Security Committee examines the intelligence activity of this office.
- Counter-terrorism (Office has no dedicated presence on GOV.UK)
- National Counter Terrorism Security Office (appears to be a similarly named, but different(?) office)
- Archive of previous Home Office OSCT page
- wikipedia: Office for Security and Counter-Terrorism