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Post Office admits computer defect after prosecutions

8 July 2013 Last updated at 23:15 BST

The Post Office has admitted that software defects have occurred with a computer system at the centre of a bitter dispute with some of its 11,500 sub-postmasters across the UK.

More than 100 say they were wrongly prosecuted or made to repay money after computers made non-existent shortfalls. Some of them lost their homes as a result and a few went to prison.

The BBC's Matt Prodger reports.