There are many signs of exploitation specific to the hospitality trade. This is a list of indicators all staff should be familiar with who work within the hospitality trade, put together by the NWG Network. Being alert to these signs means that exploitation can be detected, police can be alerted whilst this occurs and evidence can be preserved, increasing the chances of successful prosecution and reducing the numbers of child victims.
You can find out more about the NWG and their Say Something if you See Something campaign on their website.
There is a useful video from the Metropolitan Police which we recommend viewing: Operation Makesafe: Raising community awareness of child exploitation.