Savings are supposed to be the first line of defence against financial shocks. But in reality, millions of families across Britain don’t have enough to be more than a few pay-days away from trouble. For many low-income households in particular, the focus is less about building up savings and more avoiding the building up of debts and arrears. All of this can leave families vulnerable to one-off costs such as a car break-down or bust boiler – let alone bigger shocks such as redundancy.