Images of US President Donald Trump and Jeffrey Epstein were projected onto the walls of Windsor Castle on Tuesday evening, as Trump arrived in the UK for a state visit.

The projections included photos of Trump alongside Epstein, as well as Trump's 2023 mug shot.

Four people were arrested on "suspicion of malicious communications" following the projections, said Thames Valley Police.

"We are conducting a thorough investigation with our partners into the circumstances surrounding this incident and will provide further updates when we are in a position to do so," Thames Valley Police Chief Superintendent Felicity Parker said.

King Charles III will host Trump at Windsor Castle on Wednesday before talks the next day with Prime Minister Keir Starmer at Chequers, the British leader’s rural retreat.

Trump’s two-day trip comes complete with horse-drawn carriages, military honor guards and a glittering banquet inside a 1,000-year-old castle — all tailored to a president with a fondness for gilded splendor.