I'm working on an online formatting problem with a UK programmer who is not familiar with academic style requirements. The styling problem in one that is frequently encountered in APA and some Chicago-based style guides—both style guides that originated in America (U.S.). I'm wondering if UK journals also use styles based on these two American style guides.
I've published in a mix of journals including some based in the UK.
I don't think I've encountered one yet that uses APA or Chicago or any other specific style guide; they all come up with their own, which may be loosely or closely based on some other guide (if one of them has used APA or Chicago it must not have been very notable at the time, though). I don't think it's possible to say "generally" for anything regarding citation format styles, particularly across fields.