King Charles appears on Elton John's radio show in secretly recorded birthday episode

King Charles III has appeared on Sir Elton John's radio show in an episode set to coincide with the monarch's 78th birthday. During the Rocket Hour show, the King said the pop star had become "a national treasure after all these years", to which the singer joked: "I'll be on the Antiques Roadshow." The pair discussed some of their favourite musical performances, as well as the role music has played in the King's charity, the King's Trust.

The show was recorded in secret last month and will air this Saturday. Sir Elton has long been a supporter of the trust, most recently donating a pair of his rose-tinted glasses to its 50th anniversary auction this year.

In a voiceover, the singer said he was "excited to hear what he's got to say about music, about the King's Trust and memories that we both share". The King's Trust - previously known as The Prince's Trust - was established by Charles in 1976 to help young people from disadvantaged backgrounds overcome challenging situations, become employed or launch their own businesses.