Photo: The Canadian Press

A helicopter leaves the grounds of the US ambassador residence in Regent's Park, London, while demonstrators protest against the visit of US President Donald Trump Thursday July 12, 2018.

President Donald Trump traded one hot spot for another Thursday, leaving behind a contentious NATO gathering in Brussels and moving on to Britain, where he found a government in turmoil and sizable protests shadowing his every move. All was serene, however, during a lavish evening welcome ceremony at Blenheim Palace.

Hundreds of demonstrators chanted outside the U.S. ambassador's residence where Trump was staying on the outskirts of London, providing a preview of the forceful protests expected during his two-day British stay.

Trump was whisked away to an oasis of warm greetings at a black-tie reception at Blenheim, birthplace of Winston Churchill, the larger-than-life British leader cited by the president as a model of leadership. That was just one of several helicopter rides on the agenda for Trump, whose staff opted to keep him largely out of central London and the swarms of demonstrators who are likely to provide some of the defining images of his first official trip to the U.K.

Trump's Marine One departure from the ambassador's residence was met by jeers from demonstrators banging pots and pans, and another pack of protesters lined roads near the palace. Their signs read: "Dump Trump," ''Lock Him Up," ''There Will Be Hell Toupee." Police worked overtime, their days off cancelled.

Trump was greeted at the palace by British Prime Minster Theresa May, whose government has been rocked by resignations from ongoing tumult over Brexit, the nation's contentious vote to leave the European Union.

Before leaving Brussels, Trump played down the protests but acknowledged that he expected tension in Britain, which also was reeling from its soccer team's defeat in the World Cup semifinals.

"I'm going to a few hot spots," Trump said, looking ahead to Britain and his summit in Finland on Monday with Russian President Vladimir Putin. "And I said, 'Putin may be the easiest of them all.' You never know. But I'm going to a pretty hot spot right now — right? — with a lot of resignations."

The outdoor arrival ceremony at Blenheim — Trump wore a tuxedo and first lady Melania Trump a butter-yellow, chiffon off-the-shoulder gown — was a grand affair marked by a military band in bearskin hats, hundreds of business leaders in black tie and gorgeous setting sunlight.

The mood was far less jovial in Belgium earlier in the day.

During his 28 hours there, Trump had disparaged longtime NATO allies, cast doubt on his commitment to the mutual-defence organization and sent the 29-member pact into frenzied emergency session.

Then, in a head-snapping pivot at the end, he declared the alliance a "fine-tuned machine" that had acceded to his demands to speed up increases in military spending to relieve pressure on the U.S. budget. But there was little evidence other leaders had bowed to his wishes on that front.

Trump claimed member nations had agreed to boost their defence budgets significantly and reaffirmed — after days of griping that the U.S. was being taken advantage of by its allies — that the U.S. remains faithful to the accord.