[ubercow13]

For a hard STEM degree, a 2.1 is considered about what you should get at minimum if you have done enough work, and a first is good. A third most likely not worth having and you will have to explain in interviews why you didn't do any better, most likely. A 2.2 is "okay" but won't help you much in finding work in general. That's how I have come to understand it anyway.