The British Secret Services (SIS) The security services are comprised of three branches each of which provide graduates, post graduates, linguists, IT specialists and writers a wide range of career opportunities in intelligence work. MI5:  Staff 4000: It is responsible for protecting the UK against covertly organized threats to national security encompassing terrorism, espionage and … Continue reading A Briefing for the Serious Followers of Scottish Politics – Part3- British Secret Services in Scotland – I’m edging Closer to Identifying the SNP Affiliates