Britain's Prime Minister Keir Starmer delivers a speech and press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)

Britain's Prime Minister Keir Starmer delivers a speech and press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)

Britain's Prime Minister Keir Starmer delivers a speech and press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)

Britain's Prime Minister Keir Starmer arrives a head of a press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)

Britain's Prime Minister Keir Starmer takes a question, during a press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)

Britain's Prime Minister Keir Starmer leaves after a press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)

Britain's Prime Minister Keir Starmer speaks during a press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)

Britain's Prime Minister Keir Starmer delivers a speech and press conference in the Rose Garden at 10 Downing Street, London, Tuesday, Aug. 27, 2024. (Stefan Rousseau/Pool Photo via AP)