I did law for 1 or 2 months before dropping it. IT IS INCREDIBLY BORING. I honestly don't know why people do law because a) it is boring (my opinion but whatever) b) it has no use beyond itself (compare with French or History; Law isn't exactly useful outside of Law) and c) you don't even need Law A-Level to do Law at Uni (something that I realised only after starting Law A-Level. Also I'm not gonna do law anymore). As for the exams, most essay subjects are the same. 10, 15, and 25 mark questions testing your knowledge and ability to compare and contrast it with other parts of the spec. But yeah, I would think long and hard before doing Law. Consider maybe a different essay subject or try something else useful.