You don't need any specific A level subjects for Law - just high grades.
An essay based subject - English, Politics, History etc - is useful for skills, but is not essential.
Pick three subjects you will enjoy studying and therefore where you are most likely to get A grades.
Then go to some Uni Open Days this summer term and listen to several different subject talks including Law and work out if Law really is what you want to do, or if any other subject interests you more.