I gave up watching after 45 minutes.

Study Nick Clegg's facial expressions.  He has the dull eyes and unctious patter of a con man.  He is out of his depth and is mouthing a script. 

Mr. Clegg's sanctimonious interventions - on the themes of  'these other two' and 'I'm the only one who's honest' were repetitious to the point of intense irritation.

Gordon Brown - surely to goodness - is a busted flush.

David Cameron would have made an impressive leader of the Dim Lab party.  A pity he is not a Conservative.