FYI in addition to what i said earlier -
I was informed by a School of law academic that they don't give out rankings.
So it seems they only will tell you if you came first.
I find that a bit crap though that we can't find out our rankings, particularly if you have completed a very hard unit. Prospective employers may not look upon say, a 70 as being anything that great, but if they were given the context of say, the highest mark being a 71 and you being 2nd, then perhaps your results would be viewed more credibly.