Would psychology a level help me get into law?

I want to choose psychology for a levels but would it help me study law? Any other suggestions if not?

Makes no difference.

Only a few unis have preferred subjects but most accept any combination. You dont have to do an essay subject.

What other subject can I choose to be able to study law?

There arent really any set subjects.

Some are a bit safer than others. Traditional facilitating ones, but always check the entrance requirements for the unis you want to apply to as thats the most important.

https://university.which.co.uk/advice/a-level-choices/what-a-levels-do-you-need-to-study-law

Look at LSE and their entrance requirements as well as Sheffield. They both give a good idea of preferred subjects and you are normally fine with 2 preferred and one non preferred.