Ed has had a good conference, even Balls managed to get the tone of his speech right. Two-faced Chuka Umunna on the other hand has had a nightmare. He spent the first few days pea-cocking about his future leadership potential, but has gone very quiet about that since Ed’s speech. Last night he was utterly Paxo-d, failing to give a coherent explanation of the deliberate millionaire tax cut dishonesty. The facial expressions are Miliband worthy. This was the week that Chuka was found out…