Banksy's mural of a girl letting go of a heart-shaped balloon has been voted the nation's favourite artwork. The image, which was daubed onto a London shop 15 years ago, was chosen above the likes ...

The framed Girl With Balloon, one of the artist's best known works, was auctioned by Sotheby's in London. Moments after the piece was sold, the canvas of a girl reaching for a heart-shaped balloon ...