Underemployment affects 10.5% of the UK workforce
One in 10 of all workers in the UK are now officially underemployed, according to a study from the Office For National Statistics (ONS)
It says 3,050,000 workers want to work more hours each week, out of a total workforce of 29.41 million.
The number of workers in this position has shot up by 980,000 in the four years since the start of the economic recession in 2008.
ONS senior statistician Jamie Jenkins told BBC News that most of the underemployment is concentrated among part-time workers.