WLM,
Lap belts and lap & diagonal belts are used in other helicopters. Most pure passenger seats have them. In general, most crew seats have harnesses of one sort or another. Perhaps the justification for no harness with the Robbos is the lack of a stick in front of the pilot that he can hit his/her head on?
I could guess that the RHC priorities might also be affected by weight and cost too - these are elements in any manufacturer's choices .......
Misterbonkers,
I would not personally have such blind faith in those involved to automatically assume that "it must be safe" - this is not a poke at RHC particularly. I just think it is naive to assume that you can be certain that people always do their jobs properly -
that's why I always do a check before flying after maintenance has been done, even when the "engineers" have signed off a daily check.