While SC's poorly written sentiments are correct, in that people will need to be restrained from working all the hours they can whilst at the same time possibly jeopardising those they should be trying to protect from accidents, the reality of cost and maintenance manpower will rule until such time as a mandated Working Time Directive is put in place. This cannot be done for UK alone and must be a world-wide directive to protect cost sensitivities and certainly the UK's safety record.
However bad some may portray our safety status, I believe the UK is still only second to the US. (but we should also remember that we used to be first.)