I'm at Bham, it's awesome. When I applied my Firm and Insurance were AAB and AAB lol. Don't go for the easy route unless you prefer those, also you should now have a pretty decent idea of what grades your going to get (or you will after January results). I remember knowing I wasn't going to get lower than ABB.
Clearing in MechEng normally isn't terrible, my advice would be put your firm in the place you want to go to the most and the insurance in the place you like the most after that (providing it has lower entry requirements).