The ongoing public inquiry was "painstakingly unearthing the truth" -- that profits were prioritised over public safety and deregulation weakened building standards, he said.
"The response from the government, building developers and owners has fallen far short of what the families of the victims and survivors have every right to expect," he wrote in The Observer on Sunday.
"We still have too many residents in London and across the country living in high-rise buildings that are covered in dangerous flammable cladding, and we are still seeing designs for buildings that have critical safety failings."