The actions large companies take to source their products have direct implications for workers in their supply chains.

How companies can reassure their customers that the goods they're selling on Black Friday - or any other day - are ethically traded.

Traidcraft promotes international trade being undertaken in a way which reduces poverty in developing countries. Fiona Gooch looks at who bears the cost of cheap food, following a recent Dispatches programme about working conditions within UK food supply chains.