The Evening Standard reports that the 5 storey block of flats which was destroyed by fire had neither sprinklers nor alarms… https://www.standard.co.uk/news/london/barking-fire-residents-say-there-were-no-alarms-or-sprinklers-after-20-woodclad-flats-destroyed-a4163741.html 

Interesting report from the House of Commons of discussions following the visit of Margaret Hodge MP to the site of the Barking fire.

https://www.theyworkforyou.com/debates/?id=2019-06-10a.423.1&s=sprinkler#g433.1

BAFSA Chief Executive, Keith MacGillivray, been looking at the development on-line and one of the shocks is that there is car parking under the flats and the timber cladding extends down to that level covering the open side of the car parking on the front of the building. A car fire would have had the same impact!