Marine One, the U.S. presidential helicopter, gets to the UK by being transported aboard large military cargo planes like the C-17 Globemaster or C-5 Galaxy. Once in the UK, Marine One is assembled and operated by the U.S. Marine Helicopter Squadron 1 (HMX-1). It may take the call sign "Marine One" when the President is on board. This helicopter is often accompanied by other helicopters and support aircraft for security and operational purposes during the President's visit to the UK. For example, during President Trump's state visit, Marine One was flown from airports like RAF Northolt and used for short flights within the UK, such as from Turnberry to Prestwick airport or from London to Windsor Castle. This transportation and operational setup ensures Marine One is ready and secure for presidential travel within the UK.