Hands cautioned Sunday that investigators still don't know exactly what cladding was used when the building renovation was completed previous year.
Police said they are using the INTERPOL Disaster Victim Identification Standards to identify the deceased.
London police say 58 people who were in Grenfell Tower are still missing and assumed to be dead.
He said police would consider criminal prosecutions if there is evidence of wrongdoing and that the police investigation would include scrutiny of the renovation project at the tower, which experts believe may have left the building more vulnerable to a catastrophic blaze.
Commander Stuart Cundy said he expects the ongoing search and recovery effort to last "many, many weeks", as authorities work to identify the victims. He said there are roughly 2,500 similar apartment towers throughout Britain.
"But that's three days on prime minister, this is Friday evening, they needed those things in place on Wednesday", Maitlis said.
But with Jeremy Corbyn, leader of the opposition Labour Party, emboldened by a better-than-expected result in an early election that wiped out the Conservatives' majority, May's government has been forced to justify spending cuts at a time when talks to leave the European Union are beginning. A new sign was put up, removing that detail.
Major roads near the stricken building were open Saturday.
Police were called to the building and formed a barrier to control the situation.
She said: "Today is a traditional day of celebration". He also spoke of his anger that so many people have lost their lives in a tower block where the fire precautions proved inadequate.
May, who has faced criticism of her response to the tragedy in which at least 30 people died, will meet victims, volunteers and community leaders, a Downing Street spokesman said. Spain faces Macedonia on Saturday night in the tournament, which is being played in Poland.
Dozens are still missing.
"The figure of 30 that I gave yesterday is the number that I know, sadly, have, at least, died. I absolutely get why they're angry", Green said.
The NHS has confirmed 19 patients, 10 of whom remain in critical condition, from the Grenfell Tower inferno are still being treated at four London hospitals.
The tragedy has provoked a very big response from nearby communities that have donated food and shelter to the victims.
"But my understanding is that the best expert advice is that retro-fitting sprinklers may not always be the best technical way of ensuring fire safety in a building". More than 3 million pounds ($3.8 million) have been raised for the victims.
May has announced a judge-led inquiry into what happened, and on Friday promised £5 million ($6.4 million, 5.7 million euro) for emergency supplies, food and clothing.
It is going to take a period of time for our specialists, both from the police and from the London Fire Brigade, to fully search that building to make sure we locate and recover everybody that has sadly perished in that fire. Britain's Press Association says around 70 people are missing. This year, however, it is very hard to escape a very sombre national mood.