Pollster Sir John Curtice has cautioned that Rishi Sunak has a limited amount of time to make a significant impact, emphasizing the importance of his upcoming speech. Despite acknowledging Suella Braverman's powerful address at the Conservative Party Conference, Sir John believes Sunak is in a challenging situation and must demonstrate concrete progress before Christmas. Sunak's speech, scheduled for just after 11 am, is expected to confirm the cancellation of the northern section of HS2. Sir John, a Professor of Politics, emphasized the immense pressure on the 43-year-old Prime Minister. He stated that Sunak's credibility may have been undermined by his indecision regarding the future of the high-speed rail link. Failing to effectively outline his vision increases the likelihood of Tory MPs worrying about potential seat losses and initiating a whispering campaign against Sunak. Sir John believes that Sunak needs a visionary phrase supported by policies that can deliver that vision. Additionally, he highlighted the unpredictability of conference speeches and their impact on political parties. Remarking on past notable speeches by George Osborne, Neil Kinnock, and Tony Blair, Sir John underscored the importance of communication in conveying a party's shift in ideology.