Engineering construction workers protested against the undercutting of wages at three power station construction sites last week.
Building bosses are exploiting workers at rates of pay as low as £7 per hour rather than paying £16.64 per hour under a national agreement.
The protests were at energy from waste construction sites in Port Talbot, Dunbar and Rotherham.
The criticism was aimed at Danish contractors Babcock and Wilcox Volund and British firm Interserve.
Workers are demanding that all workers, including migrants, are paid the same rate.
One Unite union member in Rotherham told Socialist Worker, “It is about having the right terms and conditions.
“We demonstrated on our site and they came round to accepting the national agreement.”
GMB, Unite and Ucatt union members took part in the rallies against a lack of jobs for local workers and the exploitation of migrant workers. Unity between migrants and workers from nearby sites is key to beating the bosses.
Importantly, sticking to the national agreement should mean giving migrant workers a pay rise—not kicking them out of the job.