Today I finished making my floor texture. Its just the diffuse, spec and nomrals at the moment. I plan to add the ability to use the vertex painting abilities in UDK to be able to paint in puddles. 3Dmotive.com has a good tutorial that I can follow and adapt to work with my texture.
These are the two images I used to create the texture. They were taken from our back garden in Leicester. I used the same technique I used to make the brick texture by using a variation map to prevent some of the tiling. Below is the finished result.