Well, just looked at a few more sites for the top law firms, and mostly all of them are demanding AAB, ABB or 320 UCAS points, in addition to a 2:1. One even said they expected mostly As at GCSE.
On the bright side, one of them also said that if the grade boundry had been missed by one or two grades, or there were extunating circumstances, then they would consider the application assuming it was pretty strong in other regards.
Going by these things at least, it looks like, as many people here have stated, A-Levels are fairly important. Bright side, exceptions can be made. And if I count my E at AS, i have 320 points, lol.
Then again, possibly thinking about this a bit too early on? Just finished 1st yr at uni so have another 2 to go in any case.