Actually it went like this: the phone rang and a woman called Kirsty who I'd had previously spoken to said "Gordon would like to talk to you" and then Gordon was on the line...
Completely awesome. Good work! I signed the petition (of course) and encouraged others to do so, but I have to admit that I am delighted that it actually happened.
It's the first time I signed a petition on number10.gov.uk. I wasn't sure if anything would come of it, but I was pleasantly surprised to see that it worked.