By Emily Kaine

Copyright brisbanetimes

Four people were arrested on Tuesday after images of Donald Trump and sex offender Jeffrey Epstein were projected onto the royal Windsor Castle, where the US president is set to be hosted by King Charles during his state visit to Britain.

Trump arrived in Britain late on Tuesday (Wednesday AEST) for an unprecedented second state visit, and will be greeted by Charles on Wednesday for a day of pomp at Windsor Castle, near London.

Earlier in the day, protesters unfurled a massive banner featuring a photograph of Trump and Epstein near Windsor Castle, and later projected several images of the two onto one of the castle’s towers.

Other images projected include a birthday letter Trump allegedly wrote to Epstein more than 20 years ago – the authenticity of which the White House has denied – pictures of Epstein’s victims, news clips about the case and police reports.

The police said in a statement that four adults had been arrested on suspicion of malicious communications following an “unauthorised projection” at Windsor Castle, which they described as a “public stunt”.