How lenient is Southampton's Law School?

Hi guys, quick question.

I have a conditional offer for LLB Bachelor of Law, needing to achieve an AAA to get in.

However, my predicted grades are AAB and I believe my final grades will realistically be around AAB/ABB.

This is because, due to extenuating circumstances that the university are aware of, I was diagnosed with an anxiety disorder early in my AS year and, in my exam on Monday that I was predicted an A for in the subject, I had an anxiety attack and lost concentration for around 1/4 of my exam. This meant that I missed out on writing things that I wanted to add to ensure a better grade.

Now, I know that long-term conditions do not count as sufficient mitigating circumstances but, as the long-term condition stemmed from acute family problems that have progressed into this year, how lenient is Southampton in accepting students with grades lower than the conditional offer?

I have been very dedicated to get into Southampton with all the work I have put into my a levels despite many issues at home, it would be so saddening that an unexpected mishap could prevent me from getting in.

I'd be very grateful for a response, thanks.