Payment Protection Insurance could help you supplement your income, so it's important you check all your financial products to see if you have cover.
Check if you have policies that may cover your mortgage, unsecured/personal loans, credit cards and store cards
Also think about whether you have income protection insurance or critical illness cover
If you are unsure, it is worth contacting all the companies you have financial products with to see if you paid for insurance cover upfront, or are currently paying for it in your monthly instalments
Check your bank statements to see if there are direct debit deductions or unfamiliar entries which could be for insurance cover you already have