HBP filming in Gloucester

The Harry Potter crew is currently setting up for Half-Blood Prince shooting at Gloucester Cathedral, which served as one of three settings for Hogwarts in the first several films.

According to This is Gloucestershire, Daniel Radcliffe, Helena Bonham Carter, Robbie Coltrane, Maggie Smith, and Julie Walters will all be on set during the shoot, indicating that the Order/Death Eater fight may be slated for filming.