Prime Minister Keir Starmer is set to deliver a make-or-break speech after Labour suffers significant losses in local elections, according to the available report. The article says Starmer faces growing pressure from within his own party, including calls from some MPs for him to step down following the electoral setback. In response to the loss, the speech is described as an attempt to change the political narrative and present Labour as a more optimistic party moving forward. The report frames the situation as a critical moment for Starmer, implying that the speech could influence both public perception and internal party confidence. The information provided centers on the timing of the speech, the extent of Labour’s poll performance in local contests, and the reported increase in leadership pressure from MPs. No additional details, such as specific policy proposals, dates beyond the speech being imminent, or figures for the election results, are included in the source material provided.