We're proud to make available some good quality photos from the set of "Harry Potter and the Prisoner of Azkaban" at Virginia Water, thanks to HPANA member Nebula69_klh. Included are pictures of the horse that will be used as a unicorn, the paddock set, the man-made beach, and Rupert Grint at his trailer:
Dursley house on Privet Drive
Hippogriff 2 (stand-in for other horse)
Stone wall 2 (another angle)
Rupert Grint walking from his trailer
Extras (students) lounging about
Some great first-person accounts of the filming at Virginia Water is available at the Prisoner of Azkaban Movie Guide site, and DigiCasey has a great collection of more behind-the-scene photos.
Update: Even more pictures! Thanks to Allyson (buttah) for the tip.