Protesters will demonstrate outside Marks & Spencer's flagship Irish store today over alleged discrimination of workers in the international meat industry.
Trade union Unite claims suppliers to the food and clothes giant and other major retailers exploit some employees.
It alleges that meat suppliers operate a permanent two-tier workforce that sparks conflict between migrant and local workers, leading to community disharmony.
Jimmy Kelly, Unite regional secretary, said the union will stage a protest outside Marks & Spencer's Grafton Street shop in Dublin to highlight the plight of workers.
"M&S, and the other retailers, must face up to their responsibilities and start putting workers, communities and consumers first," he said. They dictate the price of the contracts, and they cannot wash their hands of responsibility.
The Dublin action is one of a number outside Marks & Spencer outlets across Ireland and in Britain.