Would it be possible for me to go to Harvard Watch
There are plenty of good Law Schools in the UK - and many include Study Abroad years in USA, This is usually a much better option than an entire degree overseas. Or, you could do LLB UK and American Law here (https://www.kcl.ac.uk/study/undergra...law-llb-and-jd).
The biggest challenge is likely to be the high fees (unless you are super rich), so I'd suggest starting by looking at scholarships and seeing if and when you would be eligible and for what. After that it will be about your academic level, work experience and your extra-curriculas.