I am doing B.Sc in maths (Hons.), will I be able to pursue M.Sc in stats.?

Dear, Absolutely you can do M.Sc. In statistics. In B.Sc. Maths, you already have 'Statistics' as a subject. Hence, your application will be considered. However, it is advisable to have a good command on computational statistics. It's will be of a big use for you later.