I really doubt you'll get the information, it will likely be appealed, they're hardly going to just hand over data obtained from an allied service. The Iraq inquiry has trouble with even a phone call between Blair and Bush, it is very very unlikely they'll be forcing GCHQ to release NSA data.
Spie?????????
It doesn't actually say you would get any detailed info other than a yes you were or weren't. And if you were you can apply for the details to be deleted.
They've been ordered to by a court, if they don't then they are in contempt, it's pretty simple no one is above the law
I'm more worried about ceiling cat