Police say the harrowing search for remains had paused Friday because of safety concerns at the blackened tower but has resumed.
"That is also an absolute priority for the investigation - to establish who they may be".
Demonstrators gathered outside, protesting about several issues including the fire.
David Lammy said Sunday he is anxious that documents will be quietly deleted and disposed of as police begin a search for evidence.
"I thought they took him outside with me".
British outlets said May struggled to offer support or leadership in the wake of the blaze, accusing her of lacking emotional intelligence and calling her "Maybot". Now, you look at the government documents on this building and It turns out this siding, it's a pair of aluminum sheets sandwiched around a composite core.
The Prime Minister also set out to reassure victims about the upcoming judge-led public inquiry into the fire.
Asked why the material was used, he added: "There are two separate questions".
The 91-year-old monarch said it is "difficult to escape a very somber mood" on what is normally a day of celebration.
The latest images were captured by a police recovery team sent in to find the bodies of victims and evidence of what caused the fire.
"The residents of Grenfell Tower, families who have lost loved ones, and the emergency services who have been working so hard to help them have been through some of the most harrowing and traumatic experiences imaginable", Theresa May said.
The aluminium cladding, called Reynobond, is banned for buildings taller than 12 metres in the U.S., far lower than the 24-storey Grenfell Tower that was consumed by the roaring blaze, according to a salesman for the company that manufactures it.
Experts believe the exterior cladding, which contained insulation, helped spread the flames quickly up the outside of the public housing tower early Wednesday morning. Many residents are still unaccounted for, and police said some remains may never be identified. "We've always been advocates of automatic fire sprinkler protection in tall tower blocks and they work - people don't die in sprinkler buildings", he said. British media have reported that contractors installed a cheaper, less flame-resistant type of exterior paneling on the 24-story tower in a renovation that was completed just past year.
I do believe the number will increase", police commander Stuart Cundy told reporters in front of the charred building yesterday.
Labour leader Jeremy Corbyn has already called on the government to conduct an investigation into reports that Gavin Barwell, the former housing minister who was recently appointed as the Prime Minister's adviser, had failed to OK a fire safety review request he had received.
May said she would be responsible for implementing the inquiry's findings, while the victims' legal costs would be met by the government.
The Grenfell Tower in west London, built in the 1970s and renovated several times, contains 120 homes.
No. 10 officials said support workers would ensure people could access the cash - including those who may not have a bank account.
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