If you want to be a lawyer, do a law degree.
Non-law graduates can also become a lawyer by doing a conversion post-graduate diploma or degree. Not uncommon and not necessarily a disadvantage either. A top judge once said that those who did a non-law first degree may actually be better lawyers because of their broader education, and History is of course a good subject to develop analytical and writing skills. If all your other choices are law, then you are better off with applying for law so that your PS is consistent.