The visual cornerstone of the anti-Trump protests - which included several organized marches by varying groups - was a giant balloon depicting the US leader as an angry, screaming orange baby in a diaper, clutching a cellphone with Twitter on the screen.
Many paused to photograph a robotic likeness of Mr Trump sitting on a golden toilet, cellphone in hand.
"I wanted people here to know that people in America do not support Trump in the majority. and humor is my weapon", he said.
Another demonstrator displayed an image of Mr Trump alongside Irish premier Leo Varadkar with the slogan: "Fossil fuel fools, no to climate change, no to war".
Liberal Democrat leadership hopeful Sir Ed Davey said: 'Those who called for Brexit on the basis it would mean better trade deals for the United Kingdom should hang their heads in shame'.
Langer prepares Australia for West Indies World Cup pace test
Importantly, the Australia v West Indies game will be played on the 481 pitch, so big hits might well be the order of the day. Well, I don't want to be the one who says, I told you so, but I can't help but tell you exactly that. "Looks determined.
A state banquet took place at Buckingham Palace on Monday evening.
Today, President Donald Trump signed it which means relief is headed for major-storm victims in GA, FL, IA, NE, NC, CA and Puerto Rico.
The first day of the US President's visit has been filled with pomp and pageantry.
Ivanka Trump walks with Britain's International Trade Secretary into the ballroom at Buckingham Palace.