Clouds may be gathering for Labour, but Blair sees nothing but blue skies. He's getting 'blue-sky thinking' from advisers, most prominently Lord Birt, who wants to build toll motorways. Blue-sky thinking means original optimistic ideas untrammelled by such negative concepts as practicality. In America, 'blue-sky ideas' are fanciful ones and 'blue-sky laws' protect citizens from those who sell securities made entirely of fresh air. In Britain, those encountering blue-sky thinking should carry an umbrella.
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