1000000000% drop English Lit unless you actually like it, love it and maybe see yourself doing something in that path. I'd recommend Further Maths over English Literature for Economics, accounting etc.
Warwick, UCL, LSE, Cambridge and Oxford (E&M) all like Further Maths. Now, if Further Maths isn't available to you (which it is in your case), you would have had to absolutely smash the admissions test (either TSA for Oxford E&M or TMUA for Economics but