I've been experiencing some problems with my host server over the last 72 hours which resulted in this and my other sites being offline for over 24 hours. Apparently there were several problems occurring concurrently that lead to this problem. Hopefully it shouldn't happen again.
However, one of the problems lead to the server hard drive having to be rebuilt, which made me realise that I haven't created backups of any of the sites I run. Guess what I'll be doing at the weekend?