The prime minister’s office said the two leaders agreed to meet soon and discussed trade, the economy and the Middle East.

Harry won an apology and damages from Rupert Murdoch’s U.K. tabloids. Could the lawsuit’s end also help heal the rift with his brother, William, and his father, King Charles III?

With 211 million followers on social media, the multibillionaire seems intent on using his global platform to rattle British politics.

Elon Musk, the billionaire backer of Donald J. Trump, had been promoting Nigel Farage. But on Sunday Mr. Musk said Mr. Farage “doesn’t have what it takes.”

In a barrage of posts rife with misinformation, he revived questions about a child sex abuse scandal, vilified the prime minister and defended a jailed far-right agitator.