Donald Trump inauguration: Billionaire TV star becomes US President - as it happened

The biggest question on the world's lips today is...what's Donald Trump eating for his presidential lunch? Well, I'll tell you:

He and around 200 guests will be tucking into a first course of Maine lobster and Gulf shrimp in a saffron sauce and peanut crumble.

That will be followed by Angus beef from Virginia with Idaho potatoes and a dark chocolate sauce, and a chocolate souffle with cherry vanilla ice cream for desert. California wines will accompany the meal at the Statuary Hall. 

The three-course menu isn't too far from previous lunches other new Presidents have enjoyed, with lobster in some form usually making the first course. 

Barack Obama's first lunch as commander in chief in 2009 included lobster and shrimp in the seafood stew, but duck and pheasant with winter vegetables as the main course. An apple cinnamon spongecake was for dessert. 

Four years later, the lunch included steamed lobster with New England chowder, bison with a wild huckleberry reduction and wild rice, and a dessert of apple pie. 

As well as high-profile protests along the River Thames this morning, demonstrations have been taking place in Scotland.

Banners were dropped from the side of Edinburgh's North Bridge while anti-trump campaigners will march to the US Consulate later on Friday.

Mr Trump has strong links to the country and last visited in June 2016 during the US election campaign.

He is expected to use the bible given to him by his Scottish mother, alongside one that once belonged to Abraham Lincoln, during his inauguration.

First Minister Nicola Sturgeon has congratulated Donald Trump on taking office, despite criticism levelled during his divisive election campaign.

“There are great global challenges to be faced and I wish his administration well in dealing with them," she said.

“The ties of family, friendship and business that bind our countries are very deep and long-standing.

“We share fundamental values of equality, tolerance and human rights, and I hope to see these values upheld during the new President's term in office.

“Scotland and the United States will continue to co-operate in those areas where we share common interests and goals, and when appropriate we will also look to have constructive dialogue on issues where our views differ.”

Hundreds of protesters, most of them expatriate Americans, have held an anti-Trump protest in Tokyo.

Some people held up electric candles and others carried placards reading "Love Trump's Hate" and "Women's Rights Are Human Rights", as they marched along a centralstreet.

"The Trump presidency gets my blood boiling ..everything we value could be gone. It's time to speak your mind and concerns and to do our best to salvage the values we cherish in America," Bill Scholer, an art teacher, told a Reuters reporter.

"I grew up in the 1960s, and it feels like we are going backwards, and am very worried that we will lose all of the advances we have made over these years," said Holly Thompson, a writer.

Donald Trump has emerged from Blair House with his wife, Melania, have taken a motorcade for a church service at St John's Episcopal Church in Washington, in their first engagement of the day.

After the service, they'll head to the White House to be greeted by President Barack Obama. 

If you're interested in that kind of thing, Donald Trump is wearing a black coat, trousers and shoes, white shirt and red tie. Melania is wearing a powder blue dress and jacket fastened at the collar, with matching gloves and shoes.