Defence Secretary Ben Wallace and the Tory leadership candidates have been warned against handing a £1.6bn shipbuilding deal to an Indian firm.
Mumbai-based Larsen & Toubro, which describes itself as “India's premier infrastructure developer” has been accused of using “exploitative” labour standards.
According to the GMB union, their workers are paid about a third of the salary of UK shipbuilders, and there were an estimated 95,000 serious injuries at the company last year.