The cause of the Grenfell Tower fire and the reasons why it spread as it did are currently unclear but will be established through the various investigations and inquiries which are underway. It is too soon to draw any conclusions. Those inquiries will also inform whether recommendations are going to be made for the future.
The fact that PIR insulation has been used in a cladding system for a tower block does not mean that a parallel can be drawn with Grenfell Tower. It is not simply the choice of materials, but the construction of the building and the way in which all components of the rainscreen cladding system have been used in each particular project which is important.