FILE - British Labour Party leader Jeremy Corbyn, right, and Keir Starmer, Labour Shadow Brexit secretary, leave EU headquarters in Brussels, on March 21, 2019. If opinion polls giving Labour a consistent double-digit lead are borne out on election day, Starmer will become Britain's first Labour prime minister since 2010. (AP Photo/Frank Augstein, File)
FILE - Britain's opposition Labour Party leader Keir Starmer walks with his wife Victoria at the Labour Party conference in Liverpool, England, on Oct. 10, 2023. The Labour Party hopes that is just what Britain wants and needs after 14 turbulent years of Conservative rule. Starmer, the center-left party's 61-year-old leader, is the current favorite to win the country's July 4 election. (AP Photo/Jon Super, File)
FILE - Keir Starmer, director of public prosecution, delivers a statement to the media on British lawmakers facing criminal charges relating to claims made on expenses, at the Crown Prosecution Service headquarters in central London, on Feb. 5, 2010. The Labour Party hopes that is just what Britain wants and needs after 14 turbulent years of Conservative rule. Starmer, the center-left party's 61-year-old leader, is the current favorite to win the country's July 4 election. (John Stillwell/Pool Photo via AP, File)
FILE - Labour leader Keir Starmer, right, meets with Ukrainian President Volodymyr Zelenskyy at Speaker's House in the Palace of Westminster, London, during his first visit to the UK since the Russian invasion of Ukraine, on Feb. 8, 2023. The Labour Party hopes that is just what Britain wants and needs after 14 turbulent years of Conservative rule. Starmer, the center-left party's 61-year-old leader, is the current favorite to win the country's July 4 election. (Stefan Rousseau/Pool photo via AP, File)
Britain's opposition Labour Party leader Keir Starmer takes part for the BBC's Prime Ministerial Debate, in Nottingham, England, Wednesday June 26, 2024. (Phil Noble/Pool via AP)
Britain's opposition Labour Party leader Keir Starmer is welcomed by BBC Director-General Tim Davie for the BBC's Prime Ministerial Debate, in Nottingham, England, Wednesday June 26, 2024. (Phil Noble/Pool via AP)
FILE - King Charles III during an audience with Labour leader Sir Keir Starmer in the 1844 Room, at Buckingham Palace, London, Saturday, Sept. 10, 2022. (Jonathan Brady/Pool Photo via AP, File)
FILE - Britain's Prime Minister Rishi Sunak, second right, holds a wreath as he stands with Labour Party leader Keir Starmer, left, former Prime Ministers Liz Truss, third right, and Boris Johnson, right, to attend the Remembrance Sunday ceremony at the Cenotaph on Whitehall in London, on Nov. 12, 2023. If opinion polls giving Labour a consistent double-digit lead are borne out on election day, Starmer will become Britain's first Labour prime minister since 2010. (AP Photo/Kin Cheung, Pool, File)
Britain's Prime Minister Rishi Sunak and opposition Labour Party leader Keir Starmer, left, take part for the BBC's Prime Ministerial Debate, in Nottingham, England, Wednesday June 26, 2024. (Phil Noble/Pool via AP)
FILE - Leader of the British Labour Party Keir Starmer gestures as he arrives to make his keynote speech at the annual party conference in Brighton, England, on Sept. 29, 2021. The Labour Party hopes that is just what Britain wants and needs after 14 turbulent years of Conservative rule. Starmer, the center-left party's 61-year-old leader, is the current favorite to win the country's July 4 election. (AP Photo/Alastair Grant, File)
FILE - Britain's Prime Minister Rishi Sunak and opposition Labour Party leader Keir Starmer, left, take part for the BBC's Prime Ministerial Debate, in Nottingham, England, on June 26, 2024. If opinion polls giving Labour a consistent double-digit lead are borne out on election day, Starmer will become Britain's first Labour prime minister since 2010. (Phil Noble/Pool via AP, File)
FILE - Britain's Labour Party leader Keir Starmer speaks to the media as he leaves the BBC studios, in London, on Oct. 23, 2022. If opinion polls giving Labour a consistent double-digit lead are borne out on election day, Starmer will become Britain's first Labour prime minister since 2010. (AP Photo/Alberto Pezzali, File)
FILE - Labour Party leader Keir Starmer, second from left, and British Prime Minister Liz Truss walk past the coffin of Queen Elizabeth II in Westminster Hall for the Lying-in State, in London, Wednesday, Sept. 14, 2022. If opinion polls giving Labour a consistent double-digit lead are borne out on election day, Starmer will become Britain's first Labour prime minister since 2010. (David Ramos/Pool Photo via AP, File)