By daybreak on Saturday, police cleared the streets of barriers set up by protesters to snarl traffic in the Asian financial centre, and only a few groups in the mostly youthful crowd remained.

A neighbour made a recording of the row before dialling the police, saying they were concerned for partner Carrie Symonds's safety.

Trump denied the allegations and said, "I've never met this person in my life".

Trump's bombing backdown disappointed hawkish Republicans. But it relieved Americans who do not want to see US-Iranian tensions morph into all-out war.

The Duke of Sussex is taking a break from daddy duty for the night to throw out the first pitch at the opening game of the Major League Baseball London Series at the city's former Olympic stadium on June 29.