Key lines from the King's letter to the US president, with analysis from BBC royal correspondent Sean Coughlan.

Second state visit to see King Charles An unprecedented invitation to come to the UK for a second state visit, delivered by Sir Keir via a letter from King Charles, was very well received.

Sir Keir said he was "worried" about the "crisis in masculinity" raised in the programme, which centres on a 13-year-old boy arrested for the murder of a young girl and the rise of incel culture.

During his visit to Washington, Prime Minister Keir Starmer of Britain handed President Trump a letter from King Charles.CreditCredit...Haiyun Jiang for The New York Times By Mark Landler ...