Are currently in russia. One russian Tv Channel aired footage claiming to show them leaving the country. The Foreign Office here in london has yet to comment. It follows President Putins warning that russia would consider the use of us and british suppled long range missiles on targets inside russia as a serious escalation of the war in ukraine. The uks Prime Minister, Sir Keir Starmer, is due to discuss giving permission when he meets President Biden in washington today. Sir keir said moscow had started the conflict, and could end it by withdrawing its troops from ukraine. Our political editor chris mason, whos travelling with the Prime Minister, sent this report shortly after landing in the us. The Prime Minister arriving here in washington with the foreign secretary, David Lammy Sir Keir Starmer s second visit to the White House in two months. Ukraines allies remain rather guarded in their public remarks about a change in policy on the use of Western Missiles inside russia. But the