That's awesome ! Thanks to everyone for the response. My friend reckoned we would never find out what it was, I told him he needed to have faith in the power of Forums.
Hi Vincent,
Sorry I didn’t look in the Solar System section, I was looking mainly in Observation Reports. Looking at your pics I would say that is exactly what we say, both in the way of elapsed time between them and difference in brightness. However from memory the ISS was to the left, not the right, of it and I didn't think the trajectory was as parallel as that. But I guess it is hard to remember exactly when you only see one object at a time. Though you said you posted/took those pics on the 2-7-09 ?
According to spaceweather.com we might be able to see it again. On NASA’s Human Space Flight Site in Sydney the ISS will be visible on July 12th @ 06:09 to 06:14 which is the date they say it will be docking. They don’t say what time it will be docking though, but should still be worth getting up for a look at least.
EDIT: Looking at the pics again they are the right way around, I was looking at them from the wrong point.
Regards
Craig