Exterior Ministry scenes being filmed for Deathly Hallows

According to an article from World Nuclear News, filming is underway this weekend at the UK government's Department of Energy and Climate Change for a scene in Harry Potter and the Deathly Hallows. The report states:

In an earlier film in the series about the boy wizard, the location doubled as the backdrop for the visitors' entrance to the Ministry of Magic, when visitors gained access to the Ministry through a public telephone box.

Thanks to Snitch Seeker for the tip!