Dark Horizons reported on October fifth:

"The Harry Potter Movie ("Harry Potter and the Sorceror's Stone") is being filmed round Durham Cathedral at the moment; security's pretty tight, but (we can see that) they've mocked up what I assume is a Hogwarts classroom in one room, with desks, a blackboard with all kinds of weird occult stuff on it, and stained glass windows. There are also loads of weird pillars all over the place, with 'H' on them, presumably standing for Hogwarts."