Why does Further Maths always have to be a fourth subject?

Further Maths is an important and powerful part of your programme especially if you are considering competitive applications for Maths, Physics, or Engineering. You have to study it alongside “ordinary” Maths, and your programme would be very narrow if you only did one other subject. Having three different subjects ensures that you have a good range of options to choose from. For Further Maths as part of a four A level programme you will need to have at least 5 A grades or better, including at least an A at Maths and a C in English.