Harry Potter and the Cursed Child to open in 2016

JK Rowling has announced her Harry Potter stage play will open in London's West End next year.

Called Harry Potter and the Cursed Child, it will tell the "untold part" of the boy wizard's story, including the story of the lives of his murdered parents.

However, the author said on Twitter the play was "not a prequel".

David Sillito reports.