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ROCHESTER, ENGLAND - JANUARY 16: Deputy Prime Minister Nick Clegg (L) and Justice Minister Chris Grayling visit the Cookham Wood Young Offenders Institution on January 16, 2014 in Rochester, England. Mr Clegg has announced a doubling of the time spent on schooling for young offenders, which he hopes will cut re-offending rates. (Photo by Peter Macdiarmid/WPA Pool/Getty Images)

ROCHESTER, ENGLAND - JANUARY 16:  Deputy Prime Minister Nick Clegg (L) and Justice Minister Chris Grayling visit the Cookham Wood Young Offenders Institution on January 16, 2014 in Rochester, England. Mr Clegg has announced a doubling of the time spent on schooling for young offenders, which he hopes will cut re-offending rates.  (Photo by Peter Macdiarmid/WPA Pool/Getty Images)