If you dropped English Lit then I reckon it's because Law at A-level is not a traditional subject. The Russell Group brochure has guidelines and it's becoming more and more crucial to take the subjects that the universities want rather than what you feel is right. Law at Warwick would have had plenty of applicants predicated A*A*A/A*AA/AAA and they would have had 3 solid traditionals. Sorry, but it's either that or your personal statement wasn't strong enough, or a combination of both.
Good luck with your other applications though.