UFO

I was getting the camera bag ready tonight when I spotted something in the night sky in the distance. I seemed to be moving pretty fast and never had any flashing lights like the planes we normally get overhead (and it was on a different flight path as well). I quickly grabbed the camera and managed to snap this.

Now I am not really a big subscriber to "Aliens" and spaceships etc, but I do believe there must be life of some way shape or form on other planets. But I am baffled as to what this was. Any ideas?