Sir Keir Starmer has called on British nationals in Lebanon to "leave immediately." The prime minister said he is "very worried" about the escalation of conflict in the Middle East as he reiterated his calls for a ceasefire. Mr Starmer was speaking from New York where he will attend the UN Security Council and General Assembly. Report by Kennedyl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn