Dangerous sex offenders face being forced to take lie detector tests on their release from jail, it has emerged.
Paedophiles and rapists will be made to answer a series of questions about their intentions while hooked up to a polygraph machine.
The results could see the terms of their release restricted or, in the most serious cases, land them back in prison.
It follows a series of pilots launched by Labour in April 2009 that ran until October 2011 in the East and West Midlands. That found offenders on lie detectors made twice as many admissions about contacting victims or entering an exclusion zone than without.
Offenders also reported that the tests helped them to better manage their own behaviour, according to the government.