Theresa May, the Shadow Secretary of State for Work and Pensions, has commented on new official figures showing that in the last quarter 2.8m people were underemployed, on top of the 2.6m unemployed.
"These figures show the devastating impact of Gordon Brown’s recession on families across the country", she said.
Underemployment is defined by the Office of National Statistics as where a person wants to work more hours than is usual or stated in their current employment contract.
May said "Labour’s failure to set out a credible plan for growth could leave people struggling to find work for years to come".
"Conservatives will invest in skills, infrastructure and jobs to tackle unemployment and get Britain growing again", she added.