Progressive voters have been driven away from Labour by a lack of argument and vision from Keir Starmer , according to a report using research from a senior pollster to Tony Blair and Bill Clinton. Downing Street is understood to have been briefed on the research, which has also been handed to allies of the potential leadership candidates Andy Burnham, Wes Streeting and Angela Rayner. Labour is braced for dismal results in Thursday’s elections , which could result in Starmer facing a leadership challenge . The report from UCL’s Policy Lab, using research from the eminent pollster Stan Greenberg, suggested voters felt that Starmer had a “discomfort” with progressive values. Key fights that the government could pick included a more robust challenge to Donald Trump and a more passionate defence of environmentalism. Greenberg’s findings suggested the next election would be won by those who can unite left and right “blocs” of voters.…