Prince William sings Livin' On A Prayer at charity gala

The Duke of Cambridge managed to surprise the audience at a charity gala in Kensington Palace on Tuesday night.

He took to the stage at the end of the evening with Jon Bon Jovi and Taylor Swift for an impromptu rendition of Bon Jovi's 1980s hit Livin' on a Prayer at the gala for homeless charity Centrepoint.

Nicholas Witchell reports.