A union suing the government on behalf of hundreds of former steelworkers who lost their pensions is preparing to present its case in the High Court.
Hundreds of ASW steelworkers lost their pensions
The workers lost their jobs after steel firm ASW - which had factories in Cardiff and Sheerness, in Kent - fell into receivership in July 2002.
The ISTC union said its lawyers would go to court between November 9 and 11.
The government is accused of failing to enact European law securing pensions of workers in firms declared insolvent.
General secretary Michael Leahy said: "Some of our members affected have made 30 years of compulsory pension contributions but now face destitution instead of
the safe and comfortable retirement they had saved for."
The ISTC union will ask for the case to be referred to the European Court of Justice, warning that it could cost the Government up to £2.5bn.
Around 800 workers in Cardiff lost most of their occupational pensions, as well as their jobs, when Allied Steel & Wire (ASW) collapsed two years ago.
A total of 300 workers were also made redundant at ASW's Sheerness plant.