Apparently, Britain's agency workers underpaid and exploited. That's according to a think tank probe, which found agency workers are earning hundreds of pounds a year less than employees doing the same job. Half of all agency workers say they work on a permanent basis and three-quarters work full-time. The report says agency workers will rise to one million by 2020 if current growth trends continue. Joining Sue Dougan was the author of the report - Lindsay Judge, senior policy analyst at the Resolution Foundation.