Changing a physics course

Hello,
I originally applied at the University of Edinburgh for Mathematical Physics. I had a changed of heart and asked to apply for Astrophysics instead, and my application was then changed accordingly. But I realize now that Theoretical Physics is more suitable for me (especially for what I said in my personal statement, although I did express interest for astrophysics/astronomy as well). My question is: Does changing a physics course really matter at this stage since it's still an application for the School of Physics? Would it be better to change now or once I get an offer (if I get one of course)?

Note: I'm not applying with typical A-levels (I already have my grades for that, also I'm french so it'd be my french baccalaureate grades). I'm in first year mathematics at the University of Manchester, hoping to transfer to a physics course at another university.

Hello,
I originally applied at the University of Edinburgh for Mathematical Physics. I had a changed of heart and asked to apply for Astrophysics instead, and my application was then changed accordingly. But I realize now that Theoretical Physics is more suitable for me (especially for what I said in my personal statement, although I did express interest for astrophysics/astronomy as well). My question is: Does changing a physics course really matter at this stage since it's still an application for the School of Physics? Would it be better to change now or once I get an offer (if I get one of course)?

Note: I'm not applying with typical A-levels (I already have my grades for that, also I'm french so it'd be my french baccalaureate grades). I'm in first year mathematics at the University of Manchester, hoping to transfer to a physics course at another university.