By "redbrick" i'm assuming you mean the top 10 law schools? As not all of the redbrick uni's have very good law departments. Unfortunately, all of the top 10 would require predictions of AAA (some even require AAA plus an extra AS level *Kings*). However there are some good law schools that may consider you with AAB they may just not be top 10. I think Southampton give offers of AAB, and also possibly Leicester. Both are good law schools. I think QM only gives AAA offers but I can't be certain.
Do some research and as long as you are predicted AAB i'm confident you can get some offers from great uni's.
Good luck!