Yesterday I got ABC in my AS Level results, two UMS off a B in English Literature and four UMS off an A in History. I want to get A*AA/AAA at the end of A2 and I was just wondering whether I should re-take/re-mark any of my AS units to boost my overall grades or whether I could boost all the grades without any retakes by just working really hard at A2? (The only unit I am planning to retake is my English Literature coursework one in which I got a very high D)