As the seven party leaders clash on ITV News, Demos, University of Sussex, CASM Ipsos MORI and Qlik are teaming up with the Telegraph to track Twitter's reaction. For each of the leaders, we're counting the number of Tweets sent in support (cheers) and in criticism (boos), as well as what issues are being discussed, and whether people are focusing on the politics or the personality of each. The line below combines both to show you the overall level of support each contestant is getting from Twitter.