Jens Stoltenberg, 52: So, female Norwegian electorate, what was it that first made you consider voting for debonair silver-fox Stoltenberg? Genetics give him an advantage, but Stoltenberg is the rare politician who can pull off black tie or a tweed blazer with equal aplomb. Where Cameron looks like the PR man he is when tieless in shirt sleeves, the Norwegian PM looks like he means business. He also has an instinct for when to button his jacket. Ed, Boris: please take note.