Last night I found an article which I forgot to link to.
This is from memory (so not reliable).
With the change to lighter regulation (year?) the testing of cladding was subbed out to consultants of which two were named. To save money it was agreed by all parties that simulations would be adequate where any change was deemed to be of no consequence. Having set a precedent for a particular material to be used in a particular way (with no actual test having taken place) it would become established practice and the material could be used in any similar situation without tests or simulations.
If my memory of the article (and the article itself) is substantially correct then responsibility falls on two guys in particular and (in fairness) the system as a whole.
This is from memory (so not reliable).
With the change to lighter regulation (year?) the testing of cladding was subbed out to consultants of which two were named. To save money it was agreed by all parties that simulations would be adequate where any change was deemed to be of no consequence. Having set a precedent for a particular material to be used in a particular way (with no actual test having taken place) it would become established practice and the material could be used in any similar situation without tests or simulations.
If my memory of the article (and the article itself) is substantially correct then responsibility falls on two guys in particular and (in fairness) the system as a whole.