Employers have to have consent if they want to test for drugs. Usually this is when they have a full contractual health and safety policy, which should be in the contract or staff handbook.
- limit testing to employees that need to be tested
- ensure the tests are random
- not single out particular employees for testing unless this is justified by the nature of their jobs
Workers can’t be made to take a drugs test but if they refuse when the employer has good grounds for testing, they may face disciplinary action.