To answer the original question:
In MV systems there often is no neutral.
Swedish wiring regs require multigrounding of overhead conductors for LV systems. I know this is the case in several other countries, but I don't think it is in all.
Some countries (e.g. Denmark) requires permission from the utility if you want to use the neutral as grounding conductor.
One country (Norway) doesn't even have a neutral in the first place. The system is IT as described above. (But new systems are with multigrounded neutral as I understand it.)
