"I do sense the anger", Conservative lawmaker Andrea Leadsom said as she faced the fury of local residents during a tour of the site.
The government is carrying out an "urgent inspection" of roughly 2,500 similar tower blocks across the country to assess their safety.
Three more victims killed in the Grenfell Tower disaster have been named, after Scotland Yard announced the death toll had risen to 79.
Cundy made a plea to anyone who escaped the tower but hasn't checked in with police to come forward.
Greg Hands told Sky News that "my understanding is that the cladding that was reported was not in accordance with United Kingdom building regulations".
"Our governor and the boys, we got the BA [breathing apparatus] sets on, we grabbed the thermal image camera because we knew we would need that, we locked the truck and we ran the rest of the way to the incident through the crowds and the traffic".
The fire forced residents to flee through black smoke down the single stairwell, jump out of windows or even drop their children from the 120-apartment building.
The investigation into the fire will span a "wide range of areas", Cundy said, from its original construction, to the refurbishment and how it has been managed and maintained.
Omar, 25, survived, but the brothers were separated as firefighters tried to rescue them from the burning building early Wednesday.
Flowers and missing persons posters are taped to the gates of the church, while bags of donations are piled outside the door.
Khan is London's first Muslim mayor.
He says it may be necessary for numerous outmoded tower blocks built in the 1970s to be demolished because of safety concerns.
The police are appealing to anyone with pictures or videos of the blaze to hand them in, as they may help establish not only where and how the fire started, but also how it spread.
David Lammy said Sunday he is anxious that documents will be quietly deleted and disposed of as police begin a search for evidence.
"The Prime Minister needs to act immediately to ensure that all evidence is protected so that everyone culpable for what happened at Grenfell Tower is held to account and feels the full force of the law". The leader of Kensington and Chelsea Council, the authority that owns the tower block, told the BBC it would not use the type of cladding fitted to Grenfell Tower in other buildings in the borough. He says trust in the authorities is "falling through the floor". "All our warnings fell on deaf ears and we predicted that a catastrophe like this was inevitable", the group said after the fire broke out, according to the Associated Press. Attention has focused on materials used during the renovation process completed a year ago.
Mr Cundy said: "I absolutely understand the frustration of why figures haven't been released earlier".
He told ITV: "Occupy it, compulsory purchase it, requisition it - there's a lot of things you can do".
He said the situation has become an emergency and that "all assets" should be brought to the table. "Some survivors have also complained the government has been painfully slow to find them places to sleep". At least 58 people are believed to have died in the blaze.
"I have friends in the tower and they are not telling us anything", said Salwa Buamani, 25, who came with her three-year-old niece on her shoulders.
The Home Office said late Saturday night it will make arrangements for the family of Mohammad Alhajali to "travel to the U.K.in these terribly sad circumstances".
Syrian refugee Mohammed Al Haj Ali is one of the first identified victims.
Meanwhile, Metropolitan Police commander Stuart Cundy responded to speculation that the number of dead could exceed 100, saying: "From a personal perspective, I really hope it isn't".