I'm currently an A2 student in the UK and I've received conditional offers from all my universities already. I originally wanted to do engineering but wants to do physics now, I emailed Imperial but they said Physics is full already but I can email them again once A-level results come out. How big of a chance can I switch course? Even if they won't let me switch in the summer holiday, but if I'm accepted to engineering, will I be able to change course once the academic year has started??