Strange how many people on this thread seem to have been brainwashed by the "A 2:2 means you are stupid and/or lazy whereas a 2:1 means you're not" dogma. The only thing separating a low 2:1 from a high 2:2 is a bit of luck and how you feel on exam days. Employers set an arbitrary cutoff between the two marks because it makes their lives considerably easier to introduce a grade threshold, not because a low 2:1 actually demonstrates superior workplace skills. Really this is just a failing of the digital age, where recruiters have abdicated responsibility to a computer which tells you whether you are or aren't good enough for a job based on a number that is largely incomparable across universities and to some extent even across courses.
The only silver lining is that once you have your first (proper) job no-one will ever ask for your degree classification again.