Drop physics?

Hi there,

I've been thinking about this long and hard, and i'm a year 13 student hoping to go to university, preferably a top 30 university to study economics, I am doing Maths, Physics and Level 3 Diploma in Business,
I got a D* in business and predicted to get another D* next year, and achieved a B at AS maths, and physics is new spec.

I've done some research on entry requirements and majority of the universities i'm interested in would offer me a place provided I get Distinction/Distinction/Grade A at maths, so i was wondering about I may as well drop physics and just focus on getting an A in maths, rather than splitting my focus between maths and physics, as well as that if anything i believe it would lower my maths grade and i'll possibly end up with a C in physics anyways, however I feel like i would have wasted a year of doing physics, when i could of spent all that time possibly doing more maths revision and maybe of got an A who knows? But my point being, in my case would it be best for me to just drop it and focus on maths, or continue it?