More than 70 people remain unaccounted for, according to media reports, and many of those protesting Friday were demanding the return of their loved ones' remains.
The Guardian reported that when the building was refurbished a year ago, it was finished with a cheaper form of aluminum composite cladding that did not contain fire-resistant material. "There is also a real possibility that there may be people in the building that no one knows are missing", Cundy said in a statement.
National media in London reported extensively Friday that it would have cost just 5,000 pounds (6,400 USA dollars) extra for a cladding material with better fire protection qualities.
What makes the London fire maddening for fire experts who believe in the "stay put" rule is that the Grenfell may have lacked numerous safety redundancies necessary to make it work. Hands cautioned that officials don't yet have exact details about the renovation that ended just previous year.
Commander Stuart Cundy of the Metropolitan Police warned that the death toll could rise further.
They feel they have been ignored because they are poor, he said.
London police say 58 people who were in Grenfell Tower are still missing and assumed to be dead.
"When the truth comes out about this tragedy, we may find that there is blood on the hands of a number of organizations", Lammy said.
Mr Cundy said the police investigation into the blaze would look at the building and its refurbishment in 2016 and vowed to prosecute people if there was evidence.
While 30 people have been confirmed dead, there are fears the death toll could hit hundreds. He asked anyone who was in the tower and survived to contact police immediately.
But Doug Perovic, a forensic engineer who teaches at the University of Toronto, says trouble arises when builders try to cut costs by resorting to cheaper materials that don't come up to code.
Prime Minister Theresa May, criticised for keeping her distance from angry residents during her visit to the charred remains of the 24-storey Grenfell Tower, said on Saturday the response to the disaster had been "not good enough".
The meeting is unlikely to quell complaints that May has been slow to reach out to fire survivors, despite her announcement of a $6.4 million emergency fund to help the displaced families.
Downing Street later said residents who lost their homes will receive a down-payment of at least £5,500 from Monday.
"What I'm now absolutely focused on is ensuring that we get that support on the ground", May told the BBC. They state that the material needs a fire rating of at least one to two hours - a window that would theoretically allow most people ample time to escape a blaze.
Officials are using dental records, fingerprints, DNA samples, tattoos and scars to try and positively identify victims.
As a minister in the Tory-Lib Dem Coalition, Mr Williams pledged to review "outdated" fire laws in March 2015 following a campaign by the All-Party Parliamentary Fire Safety and Rescue Group for new legislation.
"Put to the test, the United Kingdom has been resolute in the face of adversity". In recent years, London's skyrocketing home prices and housing shortage have left residents struggling.
"I must consider the fact that there may be others in the building who, for whatever reason have not been reported to us".
Communities Secretary Sajid Javid said work is starting to check on the safety of 4,000 similar buildings across the country.
The cladding has caused fires to spread quickly in the past.
The tragedy has provoked a huge response from nearby communities. More than 3 million pounds ($3.8 million) have been raised for the victims. Numerous displaced are living in churches and community centers.
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