bristol uni

hi, I am currently studying maths, physics and economics a levels and wanted to go into aerospace engineering. Will me not doing chemistry or sciences instead of econ ruin my chances of me getting in.

Thankyou. Do you by any chance know anything except work experiences that can help me get in. I have done some work experiences in general engineering and will apply to other aerospace ones, I also do air cadets, Lamda, muay Thai, volunteering and was just wondering what super curriculars I can do to get into the uni or at least increase my chances