On Wednesday, 30 October 2019 19:57:13 UTC, Dave Liquorice wrote:
Good that the Grenfell enquiry may lead to a change in the "in case of
fire, stay put" advice to people in tower blocks.
For Grenfell, as designed and built, that was the correct advice.
Each flat had a 60 minute fire resistance. The orginal fire was
extinguished within the single flat well within 60 minutes.

And Grenfell had only one stair which probably wasn't sized for full simultaneous evacuation. People coming down would also have obstructed firefighters going up.

I think there was a Fire Service shortcoming in passing information from the scene back to the 999 call handlers, but 999 call handlers aren't a substitute for a proper whole-building public-address voice alarm system.

Owain