As Rishi Sunak arrived in Washington on Wednesday for his first White House visit as U.K. Prime Minister, it became clear that his relationship with Joe Biden has improved significantly since the U.S. President mistakenly called him “Rashi Sanook” just months earlier. On Thursday, Biden, 80, and Sunak, 43, will meet for the fifth time since the latter’s appointment in October, when he became the U.K.’s third Prime Minister in a particularly tumultuous year for the nation.