Jeremy Corbyn, the leader of Britain’s Labour Party and Leader of the Opposition, has branded President Donald Trump’s policies "dangerous and inhumane" that put “the lives and wellbeing of millions of people at risk,” according to reports.

The United States president in is in the United Kingdom on a four-day trip and landed at Stansted Airport Thursday afternoon. On his first day of Trump’s visit, Corbyn hit out at him and British Prime Minister Theresa May.

“Theresa May has invited President Trump to our country at a time when his dangerous and inhumane policies are putting the lives and wellbeing of millions of people at risk,” Corbyn said. "We are committed to dialogue, including of course with those we strongly disagree with, and in government we would find a way to work with his administration while also standing up for our values.”

"But instead the Tories are rewarding President Trump with a red carpet welcome,” the Labour Party leader added. "We must show Trump and the Tories that we can and we will defeat the politics of division."

Trump came to power Jan. 20, 2017, after he won the 2016 U.S. presidential elections on Nov. 8 that year in a campaign in which he promised to “Make America Great Again.” This is his first visit to the U.K. as president.

May welcomed Trump in a red carpet reception at Blenheim Palace near Oxford Thursday evening, as they proceeded to have a lavish black-tie dinner that included business leaders. Invoking Winston Churchill she, in her speech, said: "Mr. President, Sir Winston Churchill once said that 'to have the United States at our side was, to me, the greatest joy.'"

"The spirit of friendship and cooperation between our countries, our leaders and our people, that most special of relationships, has a long and proud history," she added, while saying the U.S. was "not just the closest of allies but the dearest of friends."

A few thousand protestors booed Trump’s visit outside the mansion as the country braced itself for hundreds of thousands of protestors over the next four days.

Organisers of anti-Trump protests have promised a “carnival of resistance.” Those protests include a Donald Trump baby blimp. A group raised £18,000 ($23,657) for the large helium blimp that depicts Trump as an "angry baby with a fragile ego and tiny hands," as the organisers put it.

London mayor Sadiq Khan allowed the blimp to fly stating he "supports the right to peaceful protest and understands that this can take many different forms."

Green Day’s 2004 song “American Idiot” hit the U.K. charts ahead of Trump’s visit. A social media campaign was launched in May to get the song to No.1 for when the U.S. president visits. According to Huffington Post, the song, originally about former Republican President George W. Bush, became the No. 1 single on Monday on Amazon’s best sellers list.

Trump, in an interview with the Sun, blasted May’s Brexit plan. In the interview he also revealed he found the Trump baby blimp unwelcoming.

“I guess when they put out blimps to make me feel unwelcome, no reason for me to go to London,” the U.S. president said. “I used to love London as a city. I haven’t been there in a long time. But when they make you feel unwelcome, why would I stay there?”

The Labour Party in the U.K. has repeatedly called for Trump’s invitation to the country to be withdrawn in lieu of his comment and policies on Muslims, immigrants, women and minority groups, the Independent reported.