Don't know what Stryker is talking about maths is compulsary at GCSE/O-level
A level Maths is hard you need to keep on top of the work but the benefits of having it on your UCAS are worth the effort. I would reccomend you only take it if you got an A or higher in GCSE that should get you a C with average effort, with hard work its not impossible to do very well in it if you got a B at GCSE but means loads of effort. I took it only for AS and got a C so decided not to carry it on I have gone from 5 As to 3 A2 so I didn't need the extra workload to get into uni