There is a very good reason why a lot of people tell Y11 not to completely take the subjects they like. Because they can be indecisive and want to change later or the subjects plainly have no connection.
Please do not hurt your future by thinking just about the future of your next 2 years. This is a very essential advice! Think about now itself what course you want to apply for and which universities you would like to study in! Imagine the horror you could have if you find out you want to do a particular course but do not have the required A levels subject (although the courses usually have flexible subject courses, not all do!). Seriously, spend time on this and think about it.
I took Geography, Politics, Business and Psychology because I loved those subjects but then I realized it is a huge mistake because it offers no help for my courses. I replaced them with Bio Math Chem Geography after having various discussions with my peers. (they told me that a student of my potential should be aiming for challenge not wanting to slack).
And I do not mean to be biased but definitely take Maths. Maths is that one subject that is almost always good to take for any course you want to apply for at university.
Thank you for reading and good luck kids!