I remember turning up to Shepperton not so long ago for another, completely unrelated movie, and saw two enormous trailers for Professor Lupin and Peter Pettigrew parked outside one of the soundstages and hence how I came to recognise the background in that photo.
It looks as though it was taken at Shepperton (although it was quoted on EmpireOnline as being Pinewood). Mind you, I could be completely wrong about that, so don't quote me on it..
Going back to a Henson-related theme, I believe Nick Dudman's doing all the prospethic/animatronic stuff again for this film - whatever happened to JHCS getting some of the good stuff for a change (oh well, at least they've got other projects to be getting on with).
Definately looking forward to the third film - from the pictures recently published in the Evening Standard over here in the UK, it's going to be quite a different film from other others.
Regards,
Martyn