My options are very different and I’m not sure what to do. If I do a science degree, I want it to be mainly chemistry so like chemical engineering but I’m still not sure specifically. And if I choose economics, is it worth me doing it with maths. My A-levels are maths, further maths, chemistry and biology.
Have a look into chemical engineering. On another thread I remember seeing someone saying ChemEng, BioChem, etc. have fairly little chem in them, so I'd make sure you definitely want to do it before committing to anything.