Even though physics isnt required, it helps with CS applications, especially at top unis
Unis would prefer someone with A*AA including phys instead of A*AA including socio when applying to CS
I got an A at physics AS, and Ill say, it takes time to get good at it, but its manageable.
Id recommend taking it! Its not as hard as everyone makes it out to be, as long as your good at math (Im talking 8/9 at GCSE)