News just in! The BIKINI alert state system, used to indicate the appropriate security responses to the assessed levels of threat to Service and MOD establishments, is being replaced by a new, universal "Counter Terrorism Response Levels" system. This will apply across all Government Departments and the Critical National Infrastructure. The changes to terminology can be summarised as follows: The "BIKINI system" becomes the "Counter Terrorist Response Levels system" "Alert States" become "Response Levels" "BLACK" becomes "NORMAL" "BLACK SPECIAL" becomes "HEIGHTENED" "AMBER" and "RED" become "EXCEPTIONAL" There is an exact read-across from BLACK to NORMAL, from BLACK SPECIAL to HEIGHTENED, and from AMBER to EXCEPTIONAL, with the security measures currently associated with the three old "alert states" the same as those associated with each of the three new "response levels". The current RED alert state is not being replicated because it is so rarely used. In general terms, the security measures that may be used at NORMAL are baseline measures; response Level HEIGHTENED provides additional and sustainable protective security measures reflecting the broad nature of the threat; EXCEPTIONAL provides maximum protective security measures to meet specific threats and to minimise vulnerability and risk. The new terminology comes into force on 1 August 2006. It is unlikely that all signs will have been replaced in all establishments by then, so some BIKINI signage may be seen after that date. A Defence Instruction Notice (DIN) will be published and JSP 440 â the Defence Manual of Security â will be amended at the next opportunity.