Charles, William and Kate greet people outside Buckingham Palace – as it happened

Royals surprise those camped outside the palace following lunch with Commonwealth leaders

• What to expect: key events and timings

A children's biography of King Charles III has topped the UK book chart before the coronation on 6 May.

Maria Isabel Sanchez Vegara's King Charles is part of the Little People, Big Dreams series, which includes illustrated biographies of notable figures such as Stephen Hawking and Michelle Obama.