I was never in the construction team, I am unskilled and was too old to be one of the boys and girls . When we had our own QB I was "Accommodation Overseer", Does stress and frustration count as "Injury"? I had plenty of that with that job..I just did a few days on the site when we laid the foundations - and managed to keep out of the way of anything too dangerous or arduous.
When we did have the build there were several minor accidents , I knew one girl who was sent to the accident hospital ...Of course nobody dreamed of claiming against the Society, that would be "untheocratic"
Somebody told that nowadays they spread it over 4 or 5 days and have less people on site, any one time, so as to be safer ..