Many people who have poor credit histories, or don't have a consistent home address, have historically been unable to open regular bank accounts.
But because pensions and other public benefits are now sent directly into bank accounts, the government instituted rules requiring major banks to offer a product anyone could open to stop people from being excluded from benefits they are due.
Basic bank accounts come with debit cards and let you carry out basic everyday transactions, but offer no other features such as overdrafts or interest on your balance.