Thousands of workers whose jobs put them at higher risk of catching coronavirus will be tested even if they have no symptoms.
Taxi drivers, cleaners and retail assistants will be part of the pilot.
The Department of Health said it was to see if there is demand for testing among these kinds of workers, and to examine how they are affected by COVID-19.
Businesses including taxi firm Addison Lee, BT, services company Mitie and pharmacy giant Boots have agreed for their employees to be part of the scheme.
Councils in Bradford, Newham, Brent and Oldham will also select groups of people deemed to be high-risk for asymptomatic testing.
It came as the latest figures show the test and trace system is reaching fewer people.
In the seven days up to Wednesday 1 July, 22.6% of people with COVID-19 referred