Why is the number of agency workers set to reach one million by 2020 and what are the disadvantages they face?

The number of agency workers is set to reach one million by 2020 if current growth trends continue. This is according to a report by the Resolution Foundation entitled "Secret Agents: agency workers in the new world of work". The think tank estimates a full-time agency worker gets £430 less than an employee in the same role. To discuss the findings in more detail, Simon spoke to Dan Tomlinson, a researcher at the Resolution Foundation.