I understand your issues and would never suggest putting anyone at risk or that anyone does get put at risk.
BUT
Have you looked at the bigger picture? Are the company trying to get more out of you because the people they provide goods/services to are demanding more from them? More efficiently? Quicker? at a cheaper cost?
In difficult times it not just the person on the shop floor who gets squeezed but management and the company too, only in my experience the people on the shop floor dont neccesarily see it that way.
We (my place of work) currently have more work than the current team I work in can handle, with more pressure being put on more senior people every day, which in turn means the lesser skilled and time served guys (like me) have to step up to the mark and carry out work the more senior guys would normally undertake. Ultimatly if we dont stuff doesn't get done, we dont get jobs built, we dont earn any money and I dont have a job.
Luckily for me actual bodily harm H+S issues dont affect me, but from a point of view of stress, restless nights and longer hours- it does....
Just my 2peneth
J