It was previously reported that members of Scottish band Franz Ferdinand would feature as the Wyrd Sisters in the next Potter movie, Harry Potter And The Goblet Of Fire, but sadly the plans have changed.

However, now the roles are to be taken by Radiohead guitarist Jonny Greenwood and ex-Pulp frontman Jarvis Cocker instead.

Greenwood features on the Band Aid 20 single, now available for download and available in shops from November 29th.

Work on the film, directed by Mike Newell, is underway.