I friend of mine went down from a B to an E on coursework after moderation, but to get it remoderated, it costs a whopping £144. As he got into his uni anyway, he quickly decided against it, but if someone was borderline and just missed out on a grade which meant they missed their first choice, it's a lot of money to pay (although I think you get some of it back if the exam board finds the original marking ws wrong and changes it). It's so much more expensive than remarking for exams, which is annoying though expected as it takes so much longer to moderate.