"The Hunter pilot on the day had no criminal intent, no "mens rea", the guilty mind, effectively a prerequisite for criminal charges. If he made a mistake, it certainly would not have been intentional, who hasn't made a mistake flying, at some time or other. "
Criminal Intent is not necessary for a charge of manslaughter - it's the "reasonable care " that is important.... as in cases when Companies are charged due to deaths and injuries in the workplace