The Royal Navy's nuclear powered submarine fleets, SSN and SSBN, are currently base ported at HM Naval Base Devonport and HM Naval Base Clyde. As announced by my right hon. Friend the Secretary of State for Defence on 18 September 2006, we are, as part of the Defence Industrial Strategy, conducting a Naval Base Review to ensure that we have the right Naval Base infrastructure to meet the needs of the future fleet. No decisions have yet been taken. However, there are currently no plans to change Naval Base Clyde as the home base of the nuclear deterrent or Devonport as the supporting dockyard.