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.