President Joe Biden arrived in London on Sunday evening for talks with Prime Minister Rishi Sunak and King Charles.
On Monday morning his meeting with Rishi Sunak is expected to cover the war in Ukraine and that country’s membership of NATO.
Later he will have tea with King Charles with climate change high on the agenda.
On Tuesday President Biden will attend a two-day NATO summit in Vilnius, Lithuania, in which leaders are set to discuss the war in Ukraine and the future of the military alliance as several nations race to join.