Should i take Further maths for A levels if i want to do aeronautical engineering?

My definite subjects are physics and maths for a levels. i have taken further maths in o levels and it made maths very easy.
i am an average student but i do love maths. i just wanted to know should i take further maths for a levels because i heard some reviews about it being very tough. If not then which subject should i chose apart from physics and maths , should i take ICT, English? please help me out here , i am mind boggled .
please include in your answer just how tough further maths is for an average student who loves maths, and how much beneficial would it be for my degree in aeronautics. How hard was it for you ?
And please do include which subject should i take as a replacement for FM maths.
i need professional help . Thank you .