Hey, don't worry about what a levels you have. I am applying for law as well and unless your applying for oxbridge doesn't matter which ones you take, as long as its not 'general studies?' no idea what that is. Anyways just link it maybe in your personal statement, like doing the following topics at a level gained you certain skills which are directly transferable to handling complex matters during your law degree or smth like that. Those universities are extremely competitive though, so don't be disheartened if you don't go there in the end.