The number of workers on zero-hours contracts could be one million - four times as high as official estimates, according to new research. Such workers are on call to work when needed by bosses but employers do not have guarantee any hours.
People on zero hours contracts are expected to be on call for work, although they are not guaranteed any regular hours.
One worker, who did not want to be identified, told ITV News that her contract makes it almost impossible to budget from one week to the next, and even harder to save.
She said she felt an obligation never to turn down a shift when it was offered, and that she was regularly called into work on the off-chance that a position could become available.
She said: "Sometimes they make you wait around for an hour to see if there are any positions available. If there aren't you have to go home and that's a day's wage lost ."
Read: When is a job not a job? The rise of 'zero hours' contracts
The government is looking into zero hours contracts as new research says the number of people working such contracts could be one million.
Opinion varies dramatically among both workers and employees when it comes to zero hours contracts, as ITV News viewers demonstrate.