be 'attempted or actual manslaughter'? For one thing an injured person isn't dead, so there can be no charge of manslaughter.
My understanding is that a charge of manslaughter presupposes there was no intention to kill, in the light of which I have never understood how you can attempt manslaughter. If you attempt something you try to do it, and if you try to kill someone you are surely attempting murder?
The fact is, this man is dead - he was killed in the accident - so he'll be charged with nothing.