If you can get your teachers to predict you high enough, resit the majority of your AS modules in January and get them up to high A's it's possible to get from BCC to AAA if you put 150% into your work. Does your subject choices have coursework? If so, aim for full marks, same for your exam modules.
EDIT: If you can't get AAA - there are still universities particularly in Wales that will offer law at a lower grade standard such as;
The University of Wales, Aberystwyth - 280 UCAS points, equivalent to BBC
University of Wales, Bangor - 280 UCAS points, equivalent to BBC
University of Glamorgan - 280- 320 UCAS points, equivalent to BBC - ABB
University of Wales, Swansea - 300 - 320 UCAS points, equivalent to BBB- ABB