The process of identifying those killed when the 24-storey building went up in flames is likely to be filled with complications and take considerable time. The group wore white wristbands in a show of solidarity as they entered No 10.
British Prime Minister Theresa May met at her Downing Street office Saturday with survivors of this week's deadly high-rise fire, a day after being chastised by protesters and as the death toll continued to rise.
But unlike opposition leader Jeremy Corbyn and London Mayor Sadiq Khan, who was confronted by a young boy asking "How many children died?", May did not meet with residents, prompting criticism from locals, media and within her Conservative party.
After visiting Manchester and London after attacks or disasters, she said: "I have been profoundly struck by the immediate inclination of people throughout the country to offer comfort and support for those in desperate need".
Cundy said there may have been people in the tower that police are not aware of, which would add to the death toll.
"We're all desperately sad, we're all angry, but of course none of us as angry as those who were directly affected".
Investigators are now trying to establish the cause of the fire and how it spread so quickly through the block. There are a lot of fearless firefighters and police and ambulance workers.
Senate overwhelmingly passes measure for tougher Russian Federation sanctions
Since the new anti-Iranian senate bill targets both Tehran and Moscow, its veto by the USA president is possible, he noted. The Banking committee is key in crafting any sanctions legislation due to its oversight of the financial sector.
He said: "What did she bring, what useful things did she bring?"
Survivors of the building claimed the fatal fire resulted from a lack of maintenance to the tower.
Police said on Thursday that they had launched a criminal investigation into the fire.
He said he was not interested in knowing why they had left it so long to make themselves known, but stressed that it was vital for police to know they are safe and well. It is feared many are trapped inside the blazing building as the fire broke out in the wee hours of Wednesday.
Construction firm Rydon, which carried out the refurbishment, initially said in a statement that the work met "all fire regulations" - the wording was omitted in a later statement.
Meanwhile, donations to help those affected by the Grenfell Tower tragedyhave surpassed 2 million pounds in just two days.