My friend got ABCC at AS level and dropped one of the C's and this year she got AAB , I also got a B in accounts AS and got an A this year, very do-able, work hard do some retakes and good luck
I did E to a B too, in Maths!. Every teacher thought I was a lost cause, in fact, I'm just completely lazy.
CCE - AS BBC - A2
and I'm going to Bath so, it's completely possible. I worked MEGA hard though, easter holidays and may half-term were just pure WORK. In the library most days after school for 1.5-2 hours.
Maths - 252/300 - A Bio - 244/300 - A Chem - 237/300 - B Phys - 252/300 - A
So as you can see pretty low A's/high B's.
My A2 Parts:
Maths - 273/300 - A* Bio - 271/300 - A* Chem - 258/300 - A Phys - 240/300 - A
So i improved everything pretty dramatically except Physics due to a coursework mishap. (I was given 59/60 by my teacher but it was moderated to 33/60 by edexcel.... )