That combination is perfect for Economics certainly at any university, especially if Maths/FM/Econ are all carried onto A2.
For Law I hear your A-levels can be just about any hard academic subject - your combo fits the bill. If you're swapping anything out for English Lit, I'd advise it to be Spanish, but honestly, if you enjoy those 4 and are certain about not wanting to do anything in the sciences, leave your options as they are.