There is a very useful article from EHS Today on the subject matter. The link is below.
http://ehstoday.com/safety/die-safety-blocks-why-they-re-needed-and-how-use-them
A place for my personal thoughts/views on safety, with focus on industrial safety.
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Feb 5, 2017
Slab fall from demolition of adjacent flats damages common boundary wall
As per news reports, during the demolition of flats, a slab falls down on adjacent common boundary wall, causing damage. The area on this side was not barricaded, though, it was barricaded on other two sides by the construction company. The debris and dust during the demolition will be an issue for the neighbours and needs cordoning for sufficient distance as a protective measure.
As per statements, in the same report, there are no rules governing demolition buildings.
It is fortunate, that nobody is injured in the incident.