This guidance has been produced for use within the industry sectors regulated by the GLA (Gangmasters Licensing Authority). It can also be used as a reference to assist anyone who comes into contact with individuals who may have been trafficked and/or are being exploited by people who wish to control their movements and actions to exploit them for their labour. Labour exploitation can be an element of criminal offences of forced labour or human trafficking which themselves constitute modern slavery. This guide explains those terms and provides advice on how to spot the signs.