Labour leader Ed Miliband has promised to deter firms from exclusively employing workers from overseas, admitting his party "got it wrong" on immigration when in government.
He said Gordon Brown and Tony Blair should not have allowed uncontrolled immigration from new EU states in 2004.
He also pledged to ban recruitment agencies which use only foreign workers at the expense of "local talent".
But the Conservatives said Labour had "no credibility" on immigration.
In 2004, the government allowed free migration to the UK for workers from EU accession states including Poland, Hungary and the Czech Republic.
But its estimates that only about 13,000 people a year would come to the country were soon proved wrong, with a peak net migration figure, from the EU and elsewhere, of 252,000 in 2010.
Some countries imposed transitional controls to slow the speed of movement.
Read more : http://www.bbc.co.uk/news/uk-politics-18539472
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