In January of this year, Trump was scheduled to visit London to open the new US embassy, but he canceled the trip, claiming he felt former President Barack Obama's administration made a bad real estate deal in choosing the new location.
Trump has clashed publicly with London's mayor, Sadiq Khan, who has said the president's visit would result in mass peaceful protests and that Trump's values were the polar opposite of Londoners'.
There is speculation that, as a result of possible crowd trouble, Trump will meet the Queen or other royals at Windsor Castle, and will join the PM at her Chequers countryside retreat, rather than in central London, The Independent reports.
President Donald Trump is in the middle of a 5-country, 12-date tour of Asia, which now finds him in Beijing, China.
Trump will visit London for bilateral talks with May.
Mr Trump's visit to the United Kingdom will include talks with the Prime Minister and an overnight stay.More news: Opportunistic Jets Steal Game 1 From Preds
Maz Saleem, from Stand Up to Trump, said: "Donald Trump is an open racist and sexist, a volatile and unsafe character who seems set on taking the West into further wars".
That trip - which would involve lavish ceremonies and a stay with the Queen at Buckingham Palace - has been put off indefinitely, though Number 10 insists the invitation stands.
The US ambassador said:"He will be in North Atlantic Treaty Organisation meetings before that so he will come over here, have some meetings here". However, it will not fall into the category of a state visit.
The White House said there are "no plans" for Mr Trump to visit Ireland at present.
Relations turned particularly testy last November after Trump shared three inflammatory anti-Muslim videos posted by far-right group Britain First.