What Kind of Test Scores Do British Colleges Expect From Americans?

You keep asking this question, and you get the same answers. If you do not have the option to take anything relevant- no history, no english, no language- then you self-study.

Or not: you can apply with anything you want. But your goal is to demonstrate that you have a good grasp of what you want to do, and that you are able for the work. If you can’t find a way to do that, then studying in the UK is not the path for you.