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In 2010, the government's equality watchdog released a report on the use of stop and search powers in 42 policing areas over five years.
The report concluded that "racial stereotyping and discrimination are significant factors" in the varying rates at which people are stopped and searched.
- Black people six times more likely to be stopped and searched than white people
- Asian people twice as likely to be stopped and searched than white people
- Some of the highest racially disproportionate rates were seen in the West Midlands, Thames Valley, West Mercia and South Yorkshire
A follow-up trial with five police forces found that they were able to reduce their use of stop and search power by up to 50 percent while continuing to see a reduction in crime rates.
Nick Pickles, director of privacy and civil liberties campaign group Big Brother Watch, said:
Theresa May, who is understood to have a particular interest in stop and search and its use, is set to announce a fresh consultation on the powers in the House of Commons to ensure they are being used fairly.
The move comes just a few weeks after the Government's equality watchdog said police forces are being fairer and more efficient in their use of stop-and-search powers.
The Equality and Human Rights Commission (EHRC) found that five forces, including the Metropolitan Police, had reduced their use of stop and search powers without compromising crime reduction.
In addition, Mrs May has asked Her Majesty's Inspectorate of Constabulary to report on how the police use these powers and their report is due within a few weeks.
In 2010, the EHRC's Stop And Think report showed that at that time, nationally, black and Asian people were respectively six and two times more likely to be stopped and searched than white people.
As a result of an 18-month action programme supervised by the Commission, all but one of five forces covered saw drops in their disproportionate use of stop and search against black and Asian people.
Latest ITV News reports
A teenager who claims to have been stopped and searched "more than 20 times" has told ITV News he welcomes the government's review.