Girlfriends fault, definitely more red for us than for the other car. It's a stupid light, up in a corner and hard to see and in a string of lights all 40m or so apart from each other. I think she just didn't even see it, and since all the other lights were green just kept driving. I'm glad we didn't hit the other car going faster - we nailed the driver side door, could have been really bad.
If the other car hadn't gunned it off the line a hair early it would have just been a close call, but that's not how the law sees it (understandably).