Call for construction industry 'blacklist' probe
23 January 2013 Last updated at 19:05 GMT
There should be a full inquiry into allegations of "shameful and insidious" blacklisting of workers on projects such as Crossrail and the Olympics.
Labour's Michael Meacher said blacklisting was the "worst human rights breach in the UK since the war".
The move follows disclosures about a database of 3,000 names used to vet workers in the construction sector for more than 15 years.
Ministers said they would investigate if there was evidence of wrongdoing.
John Moylan reports.