I too have seen the film - I actually wonder whether they used the real Malham Cove or just used a studio set up of the limestone pavement albeit with the correct backdrop (with all the tourists removed of course). I am a Harry Potter expert, as are both my daughters, so we loved the film and actually understood precisely what the heck was going on. My elder daughter's boyfriend on the other hand hadn't seen any of them and was totally and utterly confused. Everything kicks off big time in the finale and all the cast will I'm sure get their full and deserved airing come June 2011. Me and my elder daughter also wondered whether the beach scenes at the end were filmed on Camusdarach beach not far from Arisaig in Scotland - if it wasn't there it was somewhere virtually identical.