Hi, I am currently doing my degree in Mechanical Engineering. In my opinion, if you are interested in Chemical Engineering, you don't really need lots of mechanics except for prob fluid mechanics which A-Level mechanics prob won't help at all. For your information, I took Stats 1 and Mechanics 1. However I don't find the mechanics 1 paper to be challenging at all as most of the stuff is covered in physics. Therefore if you are interested in biomedical studies or looking to learn something new, I would recommend going for stats 2.