All good for now. The problem was the battery, so the car was started and I'm now in Melbourne. It will be a coin toss as to whether it's going to start again, so I'm going to get a new battery today.

I was a bit concerned with all the warning lights. I think the voltage drop from the failing battery triggered sensors to detect non-existant faults, which also stopped the car from even trying to start. So it didn't try to turn over and fail like I'm used to with battery issues.