If you're like me and you find that you are getting more machines and NOD subscriptions to deal with, you might like to know that they will consolidate individual licences into a single 2, 3 or more workstation licence. This gives you a common renewal date (downside, bigger renewal fee) and one single username/password across all machines.
There's a slight saving over individual licences, but not a huge one.
If you want to consolidate, give them a call on 0845 838 0832, option 1.