Computer Science at uni but failing Further Maths? Am I finished?

Year 12 here,
our school made us sit these progress exams to determine our predicted grades, and I got 2 As, a C and a U (Maths, Physics, Comp Sci, Further Maths respectively).
I'm looking to apply to Uni of Bristol (other universities are either too ambitious or too far away) and I want to do the Computer Science course. Their website page says that Further Maths isn't required (it doesn't mention the subject at all) but if I were to apply with a U in Further Maths, would I be immediately rejected even if my other grades are okay?
If it isn't okay to apply with a U, is it worth dropping FM or taking an AS? Is it possible to stick with it and turn it into a B/A? I'm really only focused on getting into Uni of Bristol, I don't really care about losing the Further Maths for unis like Imperial and whatnot as long as I get into Bristol.
Thanks!

Ignoring the contextual offer, it is A*AA.
https://www.bristol.ac.uk/study/undergraduate/2025/computer-science/bsc-computer-science/
You need to meet that. It is better for you to do 3 A Levels, dropping further maths so you can focus more on the C in computer science.