Anyone have any ideas on how to spot a slave working at a car wash? Or on a construction site?
Not everyone is at all, my experience of the car wash is in Essex, Albanians who have become good friends, particularly of my eldest son, just guys and girls trying to make a living.
If the site has more storage than needed, maybe shipping containers or a building , then go early in the morning and see if life emerges from them.
Construction it is near impossible, gangmasters run it, deliver them to site under the guise of a labour agency. I doubt it happens much on big projects, but on smaller projects where health and safety working practices are not obvious, quite possibly.