Here is something I have been working on for a few days. I’m still trying to get the texturing right on it. It’s been fun to build, though. And I’ve been trying out renders in Indigo too. Here are the latest Blender Internal renders. Also posted at blenderuser.co.uk. 
damn good. i luv dr who its awesome. one crit, i dont think that the Police Public Call Box sign should be that indented.
The sign on the door is actually white with black text. Pics:
I have the blueprints for the TARDIS somewhere on my hard drive. I think yours looks a bit tall.
@Tynach.
On some versions, yes, it’s white with black text. Most notably, the current version. But, there have been many versions of the TARDIS. And mine is correct width/height/colour to the references I used.