Retirement mortgages are usually available to applicants aged 55 or above and are designed to work around pension income.
Equity release mortgages are a different prospect:
Lifetime mortgages mean borrowing capital against the equity in your home. There are no repayments, but when you pass away or go into care, the lender will sell the property and recoup their lending plus interest.
Retirement interest-only mortgages work similarly, but you do pay the interest every month. That limits the total loan value reclaimable by the lender when they come to sell the property and increases the remaining cash value, which the estate will pass to your beneficiaries.