If anyone was paying attention - and I know most of you aren't

- they would know that Ed aims to expose the lies that Tim tells about each HM behind their back. This started, I believe, when he saw what Tim was doing to take Ben down. Ed should have stood up for Ben there and then, but I think that he was holding back on protecting Ben because he was using it for his own advantage.
Ed has said that he will expose Tim this in front of all the HMs, but he will wait for Tim to make an obvious misstep. Time is running out for Ed to do this, however. Ed probably realizes that he is the most likely to go next Wednesday, so he will have to do it in the next 3 or 4 days.