The new total may change as the investigation continues, Cundy said.
Residents will be given £500 in cash followed by a bank payment for the rest from Monday with the money coming from the £5m fund announced by British Prime Minister Theresa May last week.
The Department for Communities and Local Government (DCLG) has written to councils and housing associations throughout the country, asking them to check by the end of yesterday whether tower blocks in their areas have been cladded using similar materials to those at the Grenfell Tower.
He added: "Sadly that work leads me to believe that the number of people missing".
London has rallied behind firefighters with a mixture of awe and support after the blaze.
He said people are "angry not simply at the poor response in the days afterwards from the council and the Government, but the years of neglect from the council and successive governments".
"But I don't think anything prepared me for what I was going to see when I was in there".
"If something needs to be done to make buildings safe, it will be done", finance minister Philip Hammond told the BBC's Andrew Marr show.
John Cowley, managing director of CEP Architectural Facades, which produced rainscreen panels and windows for Grenfell Tower's cladding sub-contractor Harley Facades Ltd, said: "Reynobond PE is not banned in the UK".
"The key question now is whether the overall design of the building's complete exterior was properly tested and subsequently signed off by the relevant authorities including the fire officer, building compliance officer and architect before commencement of the project". His royal highness was so overcome with emotion while speaking with a woman desperate to find her husband (who was trapped in an elevator during the fire), that he reached out to hug her.
Residents living near Grenfell Tower say they have been told they face three weeks without mains water in the height of summer if they return to their homes. Since their block was evacuated she had slept in several places, including her vehicle.
Her daughter added: "We don't live in a Third World country, we live in a rich country".
Asked whether Mrs May had considered resigning over criticism of her performance, a spokeswoman said: "These are incredibly challenging times, with a couple of awful incidents in a week and she is leading the country through this hard time".