Documentary exposing some of the rip-offs that are costing British consumers. Gloria Hunniford, Angela Rippon and Julia Somerville discover why so many of Britain's diesel owners are likely to have bought completely the wrong car and could end up out of pocket as a result. Meanwhile, with all types of car - petrol and diesel - sold with figures for the running costs that don't always stack up, why aren't dealers always giving buyers the right information? There is also a look at how hundreds of families that urgently needed a properly trained assistance dog have been let down by a company exploiting the demand for help.