Can I use my own calculator for a CIMA Objective test?

Hi Tomorrow I am writing my first CIMA exam, BA1, and I have downloaded the tutorial program from Pearson. I see it comes with a calculator which can be either scientific or simple. Am I allowed to bring my scientific calculator ? I am struggling to use the online calculator, and it takes a lot of time. I have a standard Casio scientific calculator (not one those programmable ones that can makes graphs), will I be allowed to use it? I am starting to get quite nervous, I have been using my calculator all along and I'll have to practice if I won't be able to use it. Thanks