Donald Trump has promised to act quickly on his first full day as President of the United States.

Following the pomp and ceremony of the inauguration, Mr Trump, a light sleeper who says he often manages on just four hours a night, woke early and was scheduled to attend a national church service at Washington Cathedral with wife Melania.

A visit to CIA headquarters in Langley, Virginia, was thought to be on his schedule, although this could be postponed as the agency is technically without a leader as Mr Trump’s nomination, Mike Pompeo, has yet to be confirmed by the Senate.

If it goes ahead, the visit will receive close scrutiny because of Mr Trump’s disparaging comments about the reliability of intelligence following the publication of the so-called “dirty dossier” about him.

Donald Trump's five key pledges

During the bitterly fought election campaign against Hillary Clinton, Mr Trump made several promises as to what he would do on his first day in the Oval Office – including the deportation of illegal immigrants who have criminal records.

“We will begin moving them out, day one. My first hour in office, those people are gone,” he told a cheering campaign rally in Phoenix, although he later said that he meant his first Monday in charge.

Although commentators have cautioned against taking Mr Trump too literally, he also vowed to suspend immigration from “terror-prone countries” and to impose “extreme vetting” on others.

He further pledged to “immediately end” Mr Obama’s policy of protecting undocumented immigrants who were brought to the US as young children.

And he said he would announce his intention to withdraw or renegotiate from the North America Free Trade Agreement and to abandon the pursuit of the Trans-Pacific Partnership.

During his inauguration ceremony, Mr Trump again reiterated that he would “put America first” – indicating that he will indeed pursue protectionist trade policies.

“From this moment on, it's going to be America First. We will follow two simple rules: Buy American and hire American,” he said.

Mr Trump has said that on his first day in charge, he will repeal Obama-era rules restricting where oil drilling and other energy production are allowed – although he may find this requires a long legislative process.

He further promised that on day one, he would indicate his support for the construction of the Keystone XL pipeline, which would bring petrol from Canada’s oil sands to Gulf coast refineries, a project Mr Obama decided against.

In pictures: Protests, pomp and Donald Trump Show all 30 1 /30 In pictures: Protests, pomp and Donald Trump In pictures: Protests, pomp and Donald Trump President-elect Donald Trump acknowledges guests as he arrives on the platform at the US Capitol in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump Donald Trump is sworn in as the 45th president of the United States by Chief Justice John Roberts as Melania Trump looks on during the 58th Presidential Inauguration at the U.S. Capitol in Washington AP In pictures: Protests, pomp and Donald Trump President Donald Trump shakes hands with Justice John Roberts after taking the oath at inauguration ceremonies swearing in Trump as the 45th president of the United States Reuters In pictures: Protests, pomp and Donald Trump President Donald Trump raises his fists after his inauguration on the West Front of the U.S. Capitol Getty In pictures: Protests, pomp and Donald Trump U.S. President-elect Donald Trump greets outgoing President Barack Obama before Trump is inaugurated during ceremonies on the Capitol in Washington Reuters In pictures: Protests, pomp and Donald Trump resident-elect Donald Trump arrives on the platform of the US Capitol in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump Attendees partake in the inauguration ceremonies to swear in Donald Trump as the 45th president of the United States at the U.S. Capitol in Washington DC Reuters In pictures: Protests, pomp and Donald Trump US President Donald Trump delivers his inaugural address during ceremonies at the US Capitol in Washington DC Getty In pictures: Protests, pomp and Donald Trump U.S. President Donald Trump waves with wife Melania during the Inaugural Parade in Washington DC Reuters In pictures: Protests, pomp and Donald Trump Protesters registered their rage against the new president Friday in a chaotic confrontation with police who used pepper spray and stun grenades in a melee just blocks from Donald Trump's inaugural parade route. Scores were arrested for trashing property and attacking officers AP In pictures: Protests, pomp and Donald Trump Demonstrators protest against US President Donald Trump in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump A woman holds a sign before the start of the Presidential Inauguration of Donald Trump at Freedom Plaza in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump Anti-Trump protesters prepare banners for a protest against the inauguration of US President-elect Donald Trump, in Berlin REUTERS In pictures: Protests, pomp and Donald Trump Demonstrators shout slogans against US President-elect Donald Trump in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump Demonstrators march, block foot traffic and clash with U.S. Capitol Police at the entry checkpoints for the Inauguration of Donald Trump Alamy Live News In pictures: Protests, pomp and Donald Trump Demonstrators display a banner as people arrive for US President-elect Donald Trump's inauguration in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump A man displays a placard as people lineup to get into the National Mall for the inauguration of US President-elect Donald Trump in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump Protesters demonstrating against U.S. President Donald Trump raise their hands as they are surrounded by police on the sidelines of the inauguration in Washington DC Reuters In pictures: Protests, pomp and Donald Trump A demonstrator wearing a mask depicting Donald Trump protests outside the US Embassy in London Getty Images In pictures: Protests, pomp and Donald Trump Demonstrators hold placards as they protest outside the US Embassy in London Getty Images In pictures: Protests, pomp and Donald Trump Former US President George W. Bush and First Lady Laura Bush arrive for the Presidential Inauguration at the US Capitol Rex In pictures: Protests, pomp and Donald Trump Michelle Obama and Dr. Jill Biden share an umbrella as President Donald Trump delivers his inaugural address at the inauguration in Washington DC Rex In pictures: Protests, pomp and Donald Trump Former Democratic presidential nominee Hillary Clinton and former President Bill Clinton arrive on the West Front of the U.S. Capitol in Washington Reuters In pictures: Protests, pomp and Donald Trump U.S. Vice President Mike Pence takes the oath of office on the West Front of the U.S. Capitol in Washington, DC Getty Images In pictures: Protests, pomp and Donald Trump Advisors to President-elect Donald Trump, Kellyanne Conway and Steve Bannon depart from services at St. John's Church during the Presidential Inauguration in Washington Reuters In pictures: Protests, pomp and Donald Trump Protesters demonstrating against U.S. President Donald Trump take cover as they are hit by pepper spray by police on the sidelines of the inauguration in Washington DC Reuters In pictures: Protests, pomp and Donald Trump An activist demonstrating against U.S. President Donald Trump is helped after being hit by pepper spray on the sidelines of the inauguration in Washington DC Reuters In pictures: Protests, pomp and Donald Trump A police officer tries to tackle a protester demonstrating against U.S. President Donald Trump Reuters/Adrees Latif In pictures: Protests, pomp and Donald Trump Police arrest and detain a protester in the street in Washington DC Rex In pictures: Protests, pomp and Donald Trump A police officer falls to the ground as another shoots pepper spray at protesters demonstrating against U.S. President Donald Trump on the sidelines of the inauguration in Washington DC Reuters

A call to the United Nations may form part of his plans, as he said he will inform officials of his desire to cancel US financial commitments to the UN climate change programme, again on day one.

In a nod to the powerful US gun-lobby, the President promised to act to get rid of gun-free zones around schools and other community facilities.

“My first day, it gets signed, OK?” he said at a January rally in Burlington, Virginia.

“My first day. There’s no more gun-free zones.”

Many of these “first-day” pledges require Congress legislation, and so cannot possibly be accomplished on a single day.

Mr Trump has also said he will meet with senior Pentagon officials on his first day to discuss the threat posed by Isis and other terrorist groups.

“I am also going to convene my top generals and give them a simple instruction: They will have 30 days to submit to the Oval Office a plan for defeating Isis”, Mr. Trump said in Greenville, North Carolina, during the campaign.

The White House website has been overhauled to replace Mr Obama's policies with Mr Trump's agenda.