Messages projected on to Buckingham Palace and Winsor Castle before Boris Johnson meets the Queen.Read more
A man has been arrested after climbing over Buckingham Palace's front gates in the middle of the night, police have said.
The 22-year-old was held on suspicion of trespass at around 02:00 yesterday by specialist royal officers, the Metropolitan Police Service said.
The Queen was in residence at the time, a palace spokeswoman confirmed.
The intruder was not carrying a weapon and the incident is not being treated as terror-related, the force said.
BBC Radio Sheffield News
A teenager from Doncaster has been given the royal seal of approval after landing a job at Buckingham Palace.
Ellie Cadman, who studied catering at Doncaster College, will start work later this month as a Demi Chef de Partie.
She said it was a once in a lifetime opportunity to be cooking for the Queen.
"I wouldn't be where I am without the college. I'm very excited about the job," she said
"I start the job next week and I'm nervous about being on my own, but with support I'll be fine."
BBC North America Editor
Speaking from Buckingham Palace, BBC North America editor Jon Sopel drew attention to the benefits Mr Trump will see in meeting the royals today.
He said: "It's 08:00 in the morning on the east coast of America, 07:00 central and 05:00 on the west coast. It's breakfast time - people will be watching this. All the American networks are carrying these pictures, they've all sent their news anchors over here to be part of this moment."
He added: "The Royal Family cuts through the United States in a way that UK politics doesn't, and Donald Trump knows this is good for business."