The Government has announced the launch of its new Test, Trace (and Isolate) initiative, with effect from 9am on Thursday 28 May 2020.
You can read the press release here: Government launches NHS Test and Trace service
You can find an overview here: NHS test and trace: how it works
You can find workplace guidance here: NHS test and trace: workplace guidance
And you can find additional guidance here: Guidance for contacts of people with possible or confirmed coronavirus (COVID-19) infection who do not live with the person