First let me say I have been attending my classes! Haha
However, in some of my larger lectures, the attendance roster gets "lost" in the crowd and I don't always get it to check my name. For the first 3 weeks in one lecture, I didn't even know they were passing a roster around, so naturally, I didn't check it.
And here's a funny story, my university had me down as English as a Second Language for my international language status, so I got placed in a class designed to help international students with their academic writing, research, studying in English. I showed up for it the first day, immediately left and went to the international office to change my language to English (sigh). I was told it "wasn't a big deal" and I could just not attend the class.
So my question is: Could this be reported to the UKBA or do they actually "track" my attendance? Is there some sort of warning given before you're slammed with not attending? (I have proof of attending all of my classes, except the odd one when I've gotten sick, in the form of the notes I've taken)