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Â鶹¹ÙÍøÊ×Ò³Èë¿Ú Newsnight has learnt that the government's flagship response to the 2011 riots, the Troubled Families programme, had "no discernible" impact on unemployment, truancy or criminality, according to an analysis.

The report - seen exclusively by Â鶹¹ÙÍøÊ×Ò³Èë¿Ú Newsnight - is embarrassing for ministers, who had trumpeted previous data suggesting 98.9% of families in the scheme had been "turned around".

Our policy editor Chris Cook reports.