Some pictures have appeared online that are supposedly of Helen McCrory as Narcissa Malfoy!  She was apparently filming scenes with Helena Bonham-Carter (Bellatrix).  They were walking down a street in heavy black cloaks, which I can only assume is from the second Chapter of Half-Blood Prince (one of my favorites in the book)!

See the pictures in the gallery, HERE! We are still waiting on confirmation saying that they are Helen. I will update when we get it.

Thanks SnitchSeeker!