Hey. Undergrad UK Chemical Physics student here. Looking for some advice when it comes to sorting out my degree path. First however. Some background info for those unaware with the degree 'system' in the United Kingdom: Most Universities in the UK have you apply for degree programs through the UCAS system - pretty much the UK Common App - in order to get your qualifications known by universities. So in a sense you have to declare what you're going to study before you come to the University. Thus, the admissions officers them judging you based on your skills in certain subject areas instead of overall performance in the plethora of High School Subjects. I originally got accepted to my current university to study Pharmaceutical Chemistry. After the first week I realized that I really did not want to take 4 years of Biology, and wanted to take more maths - so I switched to Chemical Physics. This changed my degree department from Chemistry to Physics, and removed all the Biology classes and added more maths classes throughout. However, the more that I do Physics and Maths. The more I want to rid Chemistry from my degree path and just study Mathematical Physics - which is, from what I understand, a prerequisite to Theoretical Physics. Which piques my interest a lot. If I change to this mathematical phys degree I take 2 Physics Courses from the Phys Department, and 2 Maths courses from the Maths department per semester. Instead of 2 Physics courses from the Phys department, 1 course from the Chemistry department, and 1 Maths course from the Engineering and Physics departments. The problem is. Im kind of afraid to make this change. Not because I have to fill out paperwork, but because I feel that Im 'not smart enough to take it'. Sounds very silly but my mathematical background was not that good in High School, primarily because I was very lazy during the earlier years. But ever since the first weeks of study at university - Ive been asking for more and have been doing very well in Calc. I also very much like the Chemical Physics adviser, so I worry this may piss him off slightly that I would be leaving 1 semester after convincing him to take me on. Overall, its kind of saucy but I feel I need to get this sorted out as soon as possible. As I dont want to be left behind. If you've made it this far. Thanks for reading. And if you have any advice, or just past experiences with changing majors within the Physics department - please do share!