Miniature circular cupro-nickel medal with ornate scroll and ribbon bar suspension; the face with the crowned head of Queen Elizabeth II facing right wearing the St. Edward crown, circumscribed ‘ELIZABETH II DEI GRATIA REGINA FID. DEF’ (Elizabeth II by the Grace of God Queen, Defender of the Faith); the reverse with a four-pointed faceted star imposed on decussate crossed points representing the points of the compass and creating the effect of the Union flag within a ring inscribed ‘FOR OPERATIONAL SERVICE’, the points each impaling a coronets - Royal (above left), Naval (above right), Army (lower left) and Air Force (lower right); diameter 18.26mm (0.72 inch); on original ribbon.
The Medal was instituted on 1 January 2000 and replaced the General Service Medal, to be awarded for campaigns where a separate medal is not awarded.
The Medal with the Sierra Leone ribbon was awarded for service in Operation Palliser during the civil war in that country between May 2000 and July 2002. No clasp was awarded.