"David Cameron is preparing for his first cabinet meeting as prime minister as he puts the finishing touches to his historic coalition government. The Tory leader will announce a string of junior government posts, which will include further Lib Dem appointments. He began the business of government on Wednesday evening with a first meeting of the new National Security Council. It followed a press conference in the No 10 garden with deputy prime minister and coalition partner Nick Clegg. The two men joked together as they set out what they wanted to achieve with their unprecedented power sharing arrangement - which Mr Cameron said could mark a ""seismic shift"" in British politics. In addition to Mr Clegg, four other Lib Dems will be sitting around the cabinet table when the ministers gather at 0900 BST.