Mackmeeter is correct - I found Air Law a real struggle, even failed it first time. Now some of the people I am teaching Navigation to who find my subject really tough feel Law is a breeze (with the same instructor I had!).
Best of luck with the second lot - Bristol was a good choice for distance learning. Advice for flight planning (the other subject I teach) - know where to find information in CAP 697 and the Jepp. Become familiar with the maps and what they tell you, and with each graph. I'm sure Alex will make sure you do.