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The strategy is to fight from inside the building, with fire hoses plugged into the "dry riser" - a pipe fed by fire engines on the ground.

Dr Lane said the dry riser loses effectiveness as the height of the building increases and rely on good water pressure to work against gravity.

“Why did Grenfell have flammable cladding and no sprinklers and only one dry riser? Because it was social housing and the decision makers don’t care about the social housing tenants.”

Mr Atkins is director of M&P Fire Protection which maintained the dry riser in Grenfell Tower and the sprinkler systems of surrounding buildings.

The room is linked to a dry riser which runs the full length of the tower block.