Roland Perry wrote:

There is one report circulating that a much earlier fire leaked
smoke because the fire brigade's hoses had to breach those fire
doors in order to extinguish a blaze in a flat.

The grenfell building has a dry riser with hydrants on each floor, so
running hoses up the stairs and through doors shouldn't be necessary,
but use of the dry riser requires parking a pump in one specific
location at the base of the tower, and there were photos of
vehicles/skips blocking that access during refurbishment ...