adam.L wrote:
It makes me laugh when I see a building site and some one is craning a 3 tonne concrete pipe into a trench with a 20 tonne excavator, and the guy in the trench has a hard hat on. Yer, that's help if the chain breaks

And on some site where there's no risk to the head , nothing to fall ( apart from a bit of bird sh***)- we see all sort of HSE advisories being implemented .
Look at the site advice on building sites - you would appear to need safety boots (with steel caps)(in case something falls on your toes), a hard hat ,in case something not hard enough to kill you lands on you head , and a hi viz jacket ,in case they can't see you . And ,oh - you'll need ear defenders ( so you can't be deafened ,or hear the machine that will run you down) ,and eye protection , on case you get shi*e by a bird blinds
you .
But then - something could fall on your foot , where no protection was present . Something could fall on your back, not protected by hat , the driver might not see you ( dazzled by the sea of hi viz jackets) ,and whilst wearing your ear protection ,you might not hear the danger ,or see it as the goggles are restrictive in viewing area .