On-location filming for Harry Potter and the Half-Blood Prince is set to begin today, with the Cloisters of Gloucester Cathedral closed until February 8. Many cast members including Dan Radcliffe (Harry Potter), Rupert Grint (Ron Weasley), Emma Watson (Hermione), Robbie Coltrane (Hagrid), Dame Maggie Smith (Professor McGonagall) are due for this location filming.
What scenes from the book are they filming that includes Molly Weasley, Hagrid, McGonagall and the Trio? Maybe it's the Funeral scene or the aftermath of Dumbledore's death... they have used the Cathedral in the past (PoA) to shoot scenes for the Hospital wing.
More BTS stuff needs to hurry up and get here.
Random scene with Dumbledore at the train station: