That is one of the few central London locations Mr Trump will visit during his time here. Some plan to stage an "all-night noise protest" outside the barricades surrounding Winfield House later Thursday, with those attending urged to "bring pots, drums and vuvuzelas".
Trump will travel by helicopter once there, making it unlikely he'll see protests firsthand.
Trump heads to the United Kingdom after this week's North Atlantic Treaty Organisation summit in Brussels, at which he slammed allies for not spending more on defense.
Tens of thousands of people are expected to protest against Trump's visit in central London on Friday, citing his alleged Islamophobia, controversial policies and "incendiary rhetoric" towards people with disabilities and the LGBTQ community.
Donald Trump adds to Conservative Party’s Brexit nightmare
Many Brexit campaigners still hope for a vote of confidence to oust May, but it is unlikely that they have the numbers. May and her cabinet team spent Friday at Chequers, the prime minister's country house, discussing Brexit policy.
His "America First" policies, including the decision to pull the US out of the Paris climate accord and the nuclear deal with Iran, also have brought him into conflict with Britain's leaders over substantive geopolitical issues.
The US president will touch down at Stansted Airport on Thursday evening.
The "demonstration alert" issued by the embassy also tells Americans to "exercise caution if unexpectedly in the vicinity of large gatherings that may become violent".
Mr Smyth, who is originally from Ireland, said Trump fans had been given a bad rap, and there had been lots of support for the pub's temporary renaming.
Ahead of Trump's arrival today, Mrs May said: "When we leave the European Union we will begin to chart a new course for Britain in the world and our global alliances will be stronger than ever".
GOP chairman calls out Democrats in opening statement of Strzok hearing
One of the subplots here has been Democrats' push to release the transcript of Strzok's previous, closed-door testimony. Strzok says he never allowed personal opinions to taint his work.
Assistant Chief Constable Chris Shead, from the National Police Coordination Centre, said: "Police forces are working together on a significant, multi-faceted security operation supporting the presidential visit to the UK".
Mr Smyth said he hoped the protests, and specifically the Trump baby blimp, do not upset the American public.
On Friday, May and Trump will go to to watch a joint counter-terrorism exercise by British and U.S. special forces at a military base.
A high metal fence has been erected around the USA ambassador's central London residence where Trump will spend Thursday night and the embassy sent out an alert warning Americans in London to keep a low profile in case protests turned violent.
Too early to take positives for proud England boss Southgate
Croatia, a country of about 4 million people, came to a standstill as fans watched the game on screens in squares and cafes. Despite taking an early lead, Croatia made it 2-1 in extra time where they secured a place in the final .