The Government is clear no one should be stopped and searched based on race or ethnicity and there are safeguards to ensure that this does not happen. These include Code A of the Police and Criminal Evidence Act 1984 which sets out the statutory requirements for conducting a search, the use of body worn video to increase accountability, and HMICFRS inspections where force level disparities are examined.
Last year, the Home Office asked the College of Policing to update its guidance on stop and search to provide better practice to forces on community engagement and scrutiny. The Home Office also publishes extensive data on police powers, including the use of stop and search, which allows Police and Crime Commissioners and others to hold forces to account. The latest publication is here: https://www.gov.uk/government/statistics/police-powers-and-procedures-england-and-wales-year-ending-31-march-2019.