This firefighters' strike - whatever the eventual outcome - represents the opening shot in a new stormy period facing Britain. It is a fundamental turning point. Socialist Appealhas repeatedly explained that we have entered the most turbulent period internationally since the second world war. A series of general strikes have rocked Europe, from Greece, Spain and Italy. France has been shaken by mass demonstrations against privatisation. Now Britain has become affected by this changing mood, reflected by the shift to the left in the trade unions.