Paolo Sorrentino has rediscovered his voice, his wan humour and his flair for the surreal and sensational set piece; this wintry, elegant movie is a welcome reassertion of his natural style after the facile and weirdly humourless affectations of his previous, very disappointing film Parthenope. It is a dry comedy of grief and regret which wears its dreamy melancholy and ennui like a well-tailored if fussily old-fashioned suit,