In the school I went to you had to take all three sciences (but it was a double award for combined science, not three separate ones
On top of that you had to take English language and English literature.
Had to take math
Had to do one technology subject (woodwork metal work technical drawing, textiles or food tech)
Must take a foreign language (French or German)
Must take Religious education (half award)
Must take information technology (this was split as a half award with a half award for technology, unless you did metal work, then you got a full hose in that and nothing in it.
After that you had to have two humanities subjects, (geography, history, business studies. Weirdly electronics was scheduled in the humanities timetable slots, meaning I was able to study metal work. And electronics at gcse.
My advice... Whatever you take, you'll be doing two years of study, have to complete course work, have to sit various exams, it's not that study will consume your life, but chose something you are interested in because it's a long time to have to study something that you're not interested in!
Bear in mind, if you want to do a physics a level you will need a physics gcse to get on the course. (If you want to do practically and science based subject at university, sciences are held in high regard.