Thank you so much, everyone! I’m going to continue to consider my maths teacher’s advice as after all he knows my ability and personality best. Still, all of your replies have really helped me understand what A-level Maths is actually like and what I should be thinking about.
At the moment, it’s looking like I probably won’t take it because I’ve got a lot going on (like my piano ABRSM exams), and from what many of you have said, its potentially useful but it’s definitely not essential.
I also recently found out that I need an 8 in maths (as well as strong grades in my other subjects) to take A-level at the sixth form I want to go, so I really need to focus on securing that first.
Thanks again for all your help, everyone!!