There are no specific subject requirements for Law - you just need 3 high grades.
Many people find an essay-based subject useful for writing skills but is not essential.
Law is useful degree even if you dont pursue a Law career - you will find Law grads in a very wide range of careers that have nothing to do with Law, but do rely on analytical skills, ethical judgement, 'seeing the bigger picture' and general intellectual breadth and ability.
Go to some Uni Open Days in May/June and sign up for the Law subject presentation, and you will a) learn what a Law degree actually involves and b) what graduates go on to do afterwards.