Prime Minister Theresa May has ordered a full public inquiry into the Grenfell Tower disaster.
Mrs May, who visited the site in west London on Thursday, said the inquiry was needed to ensure "this terrible tragedy is properly investigated".
Earlier, Labour leader Jeremy Corbyn said "the truth has got to come out and will come out" as he visited volunteers helping the victims.
At least 17 people were killed when a blaze ripped through the 1970s tower block in north Kensington in the early hours of Wednesday morning.
The latest victim of the Grenfell Tower fire to be named is eight-year-old Mehdi El-Wahabi.
Buildings at three NHS trusts have failed urgent fire safety tests in the wake of the Grenfell Tower disaster, according to NHS Improvement.
The communities secretary said he was ready to act if the local authority failed to provide properly for those caught up in the disaster.