Cambridge and Oxford take it as a subject for most things (though it won't fufill the hard science requirement for science degrees)
I do it at A level and really enjoy it, it's a manageable workload, interesting and the exams aren't too hard to revise for - that's not to say it's easy but if you put in the work you can do it.
The only one downside for me was the amount you need to learn, there are a lot of studies.
All in all though, definitely recommend doing it if you're interested
For a psychology degree - Biology (for biopsychology and neuroscience links) and maths (for the statistical side) are useful, but not needed. Really just take the subjects you're interested in and as long as they're not general studies or critical thinking you'll be fine with getting into university.