Pensioners may be eligible for sum worth £3,500, Martin Lewis warns

Those in receipt of the sum could receive further help in other aspects of their lives to alleviate any financial burden.

Mr Lewis continued: “It can enable you to get so many other things.

“Cheaper council tax, if you’re over 75 a free TV licence, lower water bills, the energy cost of living support payments.

“There’s so much that relies on Pension Credit, that 800,000 people on low income are missing out is a tragedy.”

Some may even be eligible for assistance with housing costs, such as Housing Benefit, council tax reduction or support for mortgage interest.