Do you mean fail, as in fail, or fail, as in... not getting a Firsts or 2:1?
If you're finding the first year too hard, I'd focus my energys on getting 40% and then looking at transferring to another University, as each year only gets harder. Most Universities will easily offer you a place for a first year pass (40%) at Cambridge. You may even get into some very respectible Universities, like Warwick, or Bath.
EDIT: I'm at Kent, and have my first exam next Thursday. It's also my least favourite topic, and the one I need to do best in (aiming for a Firsts for the whole year... for my year in industry). I hate it so much, that I just can't get myself to revise for it. Even if I sit there, dedicated to it, I'll just end up staring into space. I hope it gets better from Sunday, when I get back to Uni, as I'll have the library, and be able to study with other people on the course... but, I'm hating myself, right now.
