Harry Potter is giving up his secrets

The stars of the second tale of the pupils at Hogwarts Academy - Harry Potter and the Chamber of Secrets (due for our screens early next month) - have been coming clean about the magical blockbuster.

And from Kenneth Branagh, who joins the story as the vain and foppish Professor Gilderoy Lockhart, Hogwarts' Defence Against the Dark Arts teacher, come most of the secrets.