Police investigating the fire at Grenfell Tower say the inferno began when a Hotpoint fridge-freezer caught fire, and have revealed insulation as well as cladding tiles have failed safety tests.
Scotland Yard's also warned forensic searches might not be finished by the end of the year.
The estimated number of dead remains unchanged at 79.
Detective superintendent Fiona McCormack fears she doesn't have the full picture because of people's immigration concerns "this is pain-staking work that is going on 24/7 at the moment."
"I fear that there are more, but I do not know who they are at the moment", she said.