UK Communities Secretary Sajid Javid said there would be immediate action following the early conclusions from an investigative report into the blaze which has left at least 17 people dead.
The death toll had previously stood at 30 and officials added that it would likely take weeks for all the bodies to be recovered and some may never be identified. "The very nature of this intense fire that has occurred within Grenfell Tower - and I do believe that the number will increase", he said, as angry residents called for the process to be sped up.
"We know that at least 30 people who have died". He asked anyone who was in the tower and survived to contact police immediately.
After a turbulent three months which has seen three militant attacks and now the tower blaze, Queen Elizabeth said "it is hard to escape a very sombre national mood", in a message on her official birthday.
Rescue personnel have had difficulty reaching the top floors of the charred, 24-story tower.
Facing criticism for not meeting victims of the fire much sooner, British Prime MinisterTheresa May visited the injured at a central London hospital on Friday.
"Sadly we do not expect there to be any survivors", Cundy said.
May on Friday announced a 5 million pound ($6.4 million) fund following meeting with survivors of the Grenfell Tower tragedy.
The Prime Minister also said there had been "huge frustrations" on the ground as people struggled to find information.
The identification of the victims is proving very hard - which experts attribute to the extreme heat of the fire.
The construction firm behind the partial refurbishment at Grenfell Tower a year ago has said all required building regulations, as well as fire regulation and health and safety standards had been met. This relies on dental records, fingerprints and DNA when possible and also features like tattoos or scars.
There is palpable anger on the streets that those in authority could have done more to prevent the disaster that has also sparked concerns that the blaze may not be the last such tragedy without dramatic changes to Britain's public housing towers.
Morocco said seven of its nationals were among the dead.
But Nick Paget-Brown toldBBC Newsnight: "Many residents felt that we needed to get on with the installation of new hot water systems, new boilers and that trying to retrofit more would delay the building and that sprinklers aren't the answer".
The protesters barged their way through an automatic door at Kensington and Chelsea council town hall and sought to gain entry to an upper floor.
Concerns about other tower blocks arose after Sajid Javid, the Communities and Local Government Secretary, admitted he would be "worried" about putting his children to bed in a similar high-rise building.
"Meet the victims!" one person yelled as Leadsom was interviewed on Sky News.
Officials said Friday they are doing everything they can to relocate those displaced by the tower.
"We need to have an explanation for this", she said.
Lewisham Homes was prosecuted a year ago and ordered to pay out more than £60,000 for breaking fire safety laws after two women died in a deliberately started fire in a Deptford tower block. They say their complaints were ignored - and fear it was because the tower was full of poor people in a predominantly wealthy borough.
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At least 30 confirmed dead following London tower fire
The cause of the Grenfell Tower fire is still unclear, but residents have been claiming since 2009 that the building was unsafe. A lawyer for the family told CNN that Trevisan spoke with her parents before she died, telling them: "I am going to heaven".