Mayor Boris Johnson says 174,000 men and women are missing out on an extra 35-pounds a week.
So as part of his "Know Your Rights" campaign, he's urging the capital's older residents - and their carers - to check they're getting all the payments they're entitled to.
The details now from Liz Wickham.
More top news
The Labour MP expects the death toll in the Grenfell fire to be well above 79 and blames the disaster on Tory attitudes to social housing.
A large fire at a car storage yard this morning destroyed 8 cars and left another 35 damaged
Residents from Grenfell Tower who were being temporarily housed in a Kensington hotel say they were told to leave with just hours notice