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Nick Clegg 'sorry' for tuition fees pledge

19 September 2012 Last updated at 23:03 BST

Deputy Prime Minister Nick Clegg has apologised for the Lib Dems breaking their pledge to oppose an increase in student tuition fees.

In a party political broadcast to be aired next week, the Lib Dem leader says he is sorry the party "did not stick" to its pre-election promise.

"When you have made a mistake you should apologise," he adds.

The BBC's Nick Robinson reports.