When Donald Trump touches down in London on Monday morning to start a three-day state visit, the well-oiled machinery of state will swing immediately into action. The red carpet will be thoroughly rolled out.
Trump will be whisked directly from the airport to Buckingham Palace for a private audience with the Queen in his own blacked-out limousine.
Last time he came to the UK, on a briefer "working visit," there were huge protests and these are expected to be reprised, so there will be no carriage rides or other public-facing events of the kind Barack Obama enjoyed on his state visit and that are usually extended to foreign leaders.