Warwick econ is definitely competitive. I know plenty of students here who have 4As. One guy here in third years got 8As, with 7 traditionals. I got AAABBB in traditional subjects, and I realised that FM is nothing special when I see every other person having done it. You do find the odd one who got in with AAB, AABb, AABB and stuff, but in general, the calibre of students is pretty damn good. Same as LSE, and often similar to oxbridge.