For live updates of President Trump’s visit to Britain, go here.

Only a few hours into his trip to the U.K., Britons learned that the American president who had just shaken up NATO allies in Brussels was not out of the provocation business.

Around the time a dinner in Mr. Trump’s honor was taking place at an Oxfordshire palace, word spread that he had given an interview highly critical of the dinner’s host. That would be Prime Minister Theresa May.

And so ended Day 1.

Some highlights of the trip so far:

• Mr. Trump, fresh from breaking eggs in Brussels, was back in form in Britain, telling a newspaper that Prime Minister May was mishandling the Brexit talks.

• Shortly after he arrived at the ambassador’s residence and again outside the dinner, protesters began to make their voices heard.