I'm not sure what the protocol for such re-assignment is - I've always known it'll get a new address if it's powered down for example, but yesterday, I was downloading a lot of files via FTP (about 10 mins worth) and it re-assigned halfway through!
So, I'm thinking that a static address is probably best!
There's two questions I therefore now have:-
1) Are there any disadvantages to static addresses?
2) What address should I use? (do I simply make the current dynamic one static?)
Looking forward to any advice!