The Grenfell inquiry will look at the fire's causes, the adequacy of regulations, the building's refurbishment previous year and the actions of the public authorities before and after the incident.
The head of the public inquiry into the Grenfell fire Sir Martin Moore-Bick has vowed to pursue all avenues of enquiry that he deems relevant in the investigation into the causes of the tragedy, even if his recommendations could be used as the basis for future criminal prosecutions.
"Many of them can, of course, provide valuable evidence and I shall ensure all their evidence is heard and carefully assessed".
"They said, the fire brigade told us you have to go up, we sent a helicopter for you", she said.
Calling the fire a "tragedy unprecedented in modern times", the former Court of Appeal judge said the scope of the inquiry is "not adversarial" or to "punish or award anyone compensation".
"We are acutely aware that so many people died and that many of those who survived have been severely affected", he said. "We owe that to the families, to the people who have lost loved ones, friends and the homes in which they lived", said the prime minister.
The probe will examine how the fire started, regulations of high-rise buildings, and the actions of Kensington and Chelsea Council.
A silent march will take place later on Thursday at the Notting Hill Methodist Church to mark three months since the fire. This decision is notable due to the criticism the ex-judge faced for excluding a wider examination of social housing policy. Campaigners have called for scrutiny of the systemic issues underlying the disaster.
Around 300 applications had been received for core participant status in the inquiry, with some having been granted already, Moore-Bick said.
"I wish to emphasise that the inquiry is not limited to factual questions surrounding the development of the fire".
After the statement, Sir Martin will not be taking questions. But it was deemed inappropriate by some of the people who were there, including the member of Parliament for Kensington, Labour's Emma Dent Coad.
The inquiry chairman faced anger from the community in a series of public meetings created to help shape the terms of reference but, once these were announced, the inquiry was criticised for excluding an examination of wider social housing policy.
The BBC survey, based on a Freedom of Information request, looked at about 2,000 properties owned by 56 housing authorities.