Tralling through the Lexicanum I found a Bit about Garran Crowe defending a desolate planet called Birmingham.
On clicking the link I found that:
Did the guys in Notingham put really put this in? or is the guy filling out the entry having a joke?"Birmingham was mentioned in Rogue Trader as one of the feral or backward planets where the musket is still in use. The world is also known as the Black Planet, as it receives almost no visible light; as a result, no one wants to go there, and its inhabitants have become linguistically and culturally isolated. "