Regular rapid testing for people without coronavirus symptoms will be made available across England this week, the government has said.
The community testing regime - expanded to cover all 317 local authorities - uses rapid lateral flow tests, which can return results in 30 minutes.
Local councils are being encouraged to prioritise tests for those who cannot work from home during the lockdown.
The health secretary said asymptomatic testing can help break transmission.
Meanwhile, NHS England has invited tens of thousands of people over 80 to book vaccinations.
A further 563 people have died in the UK within 28 days of a positive Covid test and another 54,940 cases reported, according to government figures on Sunday.
The total number of deaths in the UK after a positive test passed 80,000 on Saturday.
The government has launched a campaign telling people to act like they have got the virus in a bid to tackle the rise in infections.
Under the national lockdown, people in England must stay at home and can go out only for limited reasons such as food shopping, exercise, or work if they cannot do so from home. Similar measures are in place across much of Scotland, Wales and Northern Ireland.
