LONDON — In London, a giant orange balloon depicting him as a baby having a tantrum will float over Parliament. There will be a “wall of sound” featuring mariachi music and the cries of children in detention centers calling out for their parents. In Scotland, a newspaper has demanded that he leave, and a “Carnival of Resistance” involving throwing rubber boots at a Trump doll is being planned.

Protesters across Britain are playing a cat-and-mouse game with President Trump as he embarks on a four-day visit to the country, following talks in Brussels with NATO allies and ahead of a meeting in Finland with President Vladimir V. Putin of Russia.

Campaign groups have organized a packed schedule reflecting an angry national mood, one reminiscent of protests against the Iraq War more than a decade ago. But those protests were aimed at American foreign policy more than at the person of former President George W. Bush.

This time, demonstrations will be against the man himself.

Mr. Trump has generated “the greatest amount of unease and tension against a single individual as opposed to an administration,” said Scott Lucas, a professor of international and American studies at the University of Birmingham.