FILE - Labour Party leader Keir Starmer smiles as he speaks to his supporters at the Tate Modern in London, Friday, July 5, 2024. After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer will step through the front door of 10 Downing St. for the first time as prime minister on Friday. (AP Photo/Kin Cheung, File)
FILE - A view through a screen of 10 Downing Street as a video camera films in London, Monday, Jan. 17, 2022. After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer will step through the front door of 10 Downing St. for the first time as prime minister on Friday, July 5, 2024. (AP Photo/Kirsty Wigglesworth, File)
FILE - Britain's Labour Party Prime Minister Keir Starmer and his wife Victoria walk past supporters towards 10 Downing Street in London, Friday, July 5, 2024. After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer will step through the front door of 10 Downing St. for the first time as prime minister on Friday. (AP Photo/Kin Cheung, File)
FILE - Britain's Labour Party Prime Minister Keir Starmer and his wife Victoria pose for the media on the doorstep of 10 Downing Street in London, Friday, July 5, 2024.After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer will step through the front door of 10 Downing St. for the first time as prime minister on Friday. (AP Photo/Kin Cheung, File)
FILE - Britain's newly elected Prime Minister Keir Starmer and his wife Victoria enter his official London residence at No 10 Downing Street for the first time after the Labour Party won a landslide victory in the 2024 general election, in London, Friday July 5, 2024. After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer will step through the front door of 10 Downing St. for the first time as prime minister on Friday. (Stefan Rousseau/Pool Photo via AP, File)
FILE - A Police officer patrols 10 Downing Street, in London, Monday, Jan. 24, 2022. After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer will step through the front door of 10 Downing St. for the first time as prime minister on Friday, July 5, 2024. (AP Photo/Alberto Pezzali, File)
FILE - Larry the cat, Chief Mouser to the Cabinet Office poses for the cameras outside 10 Downing Street in London, Wednesday, March 13, 2024. After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer will step through the front door of 10 Downing St. for the first time as prime minister on Friday, July 5, 2024. (AP Photo/Alberto Pezzali, File)