Cracking photo!
it looked more like a launch site than just a test rig.
I don't think Spadeadam was intended on being a launch site; as far as I'm aware it was only designed as a test facility for the assembled rocket before being sent to Woomera. The reason why Aussie was used is because if the rocket failed on launch during testing the debris would land harmlessly on kangaroos and other desert wildlife, not the occupants of the north of England and Scotland. As a weapon the Blue Streak was designed to be launched from underground silos.