As we approach the half way point in the UK’s Christmas election, the Alex Salmond Show summons back our celebrated panel of political pundits to analyze the campaign to date. In the blue corner, we have Peter Oborne, in the yellow, Lembit Opik, in the red, Professor Richard Murphy and from the tartan corner, Ruth Wishart. Our experts tell us who's up, who's down and who is likely to emerge triumphant from the political pantomime.