On Newsnight yeaterday, a Grenfell estate resident (but not a resident of the tower) said that there were unprotected gas pipes running up the stairwell. This was also mentioned earlier by residents. But not by any pros I heard interviewed.
Based on other comments, I thought initially they had gone over to individual heating systems in each flat - hence the need for new gas pipes. But it seems this is wrong - it had a new communal heating system.
So why the need for new gas pipes to all the flats? Or are they in fact not gas but water? A layman might well not know the difference.
Sadly, running any new services through a fire protected area might well compromise that, if badly done.