I know clearly what I am thinking and posting, yet you contradict almost every single word that I post on this thread. My thoughts are equally as valid as your's. It is you that is doing the bickering by constantly contradicting almost everything that I post on this thread.
I did not bring up the issue of "roof safety" initially but I did attempt to try and explain why it might have been a consideration for someone trying to make decisions, in the heat of the moment on the day. I do have some experience of working on flat roofs and I don't use safety harnesses because I don't have to but I still take certain safety precautions applicable to the roof that I am on.
You are looking at everything with the benefit of hindsight which, unfortunately, the people on the day, making the decisions, did not have.
How you seem to think that you know exactly what happened on the day and anyone else with alternative ideas as to why things may have happened as they did is wrong, I don't know. The reality is that very little is known for sure and that is why an investigation is being carried out.
As for "trolling" you are talking nonsense.