Been through the same problem around 9:05 as you, marB. I think the best way is to sign in first into the system. In order to do that, you can reserve something else like an iPod. Then you can pass the sign in progress when you reserve an iPhone. I think it will work. good luck!!
I'm afraid to shut the page down. It states that I've connected successfully but it just won't move forwards. It's just timed out, does this mean I've lost my reservation?