People will be told to self-isolate for two weeks if they've been in contact with someone who has coronavirus as the government launches its Test and Trace regime.
But what happens to workers' pay if they're forced into isolation?
There are concerns that people could be asked to self-isolate for period of 14 days more than once in the coming weeks.
And people who can't work from home will be worried about how they're going to make ends meet.
Health Secretary Matt Hancock said he believes "the vast majority" will self-isolate voluntarily under the new system and that people will not receive penalties for failing to abide by the guidelines "in the first instance", but he left open the possibility of making it mandatory for people to stay at home in the future.
Here's everything we know so far about how the system works and what workers are entitled to if they're told to self-isolate under the Test and Trace programme.
Can I work if I'm in self-isolation?
Yes. This isn't like furlough where you're not allowed to work.
If you can work from home, the Government say you should.
Will I still get paid?
If you're working from home, yes. You should get paid as normal.
What if I can't work from home?
Here's where it gets tricky.
Employees who can't work from home should get statutory sick pay, if they are normally entitled to it.
They government also says you should be offered the opportunity to take the 14 days as paid holiday.
What? Use my holiday days?
Yep. The guidance reads: "If people can’t work from home, employers must ensure any self-isolating employee is receiving sick pay and give them the option to use their paid leave days if they prefer."
What about self-employed people?
If you can work from home, you should.
If you can't, and your business is affected, the government suggest you could apply for a grant.
The guidance reads: "If your business has been adversely affected by coronavirus, you may be eligible for a grant through the Self-Employment Income Support Scheme. More information on this scheme, and other support available if you are not eligible, is on GOV.UK."
Is statutory sick pay good enough?
A lot of people think not.
There are fears that many workers will not be able to afford to isolate and will be forced to keep working.
TUC general secretary Frances O'Grady said: "We need a testing and tracing programme up and running as soon as possible.
"But it will not be effective if workers are pushed into hardship when they are required to self-isolate.
"Statutory sick pay is just £95 per week - and two million workers aren't even eligible for that.
"If workers can't afford to self-isolate, then they will be forced to keep working.
"That will put them, their workmates and their local community at risk, and undermine the entire Test and Trace programme.
"The Government must extend statutory sick pay to everyone - no matter what they're paid - and raise it to the level of the real Living Wage, £260 per week.
"And the self-employed income support scheme must remain in place as a source of financial support for those forced to self-isolate. That's how to show that we really are all in this together."
Shadow health secretary Jonathan Ashworth called for "enhanced" sick pay when he was asked about the new system and people being expected to self-isolate for 14 days if contacted.
What about migrants who aren't eligible for sick pay?
Hardship for migrants asked to self-isolate has also been raised.
Prime Minister Boris Johnson appeared to be caught off guard when challenged at the Liaison Committee about "no recourse to public funds" (NRPF) - a standard condition applied to people staying in the UK with temporary immigration status.
Work and Pensions Select Committee chairman Stephen Timms highlighted a couple in his East Ham constituency with two children who were being forced into "destitution" as a result of NRPF.
Zoe Gardner, policy adviser at the Joint Council for the Welfare of Immigrants, said it is "essential" that everyone is "equally protected" with a social security net so that everyone can self-isolate when they need to.
"Migrants often find themselves in insecure work with flexible or zero-hours contracts - including many who've been keeping Britain going through their frontline work throughout the pandemic," she said.
"But those in insecure employment often have no choice but to continue working even where there is a risk to their health, or when they need to isolate, because they cannot risk losing their jobs or having their hours cut."
She added: "For migrants with no recourse to public funds, losing their job puts them and their families at imminent risk of destitution as they are barred from accessing essential basic support like Universal Credit or Employment Support Allowance."
Citizens Advice said people who are subject to immigration control and have no recourse to public funds will still be able to get statutory sick pay, providing they meet the usual eligibility, but not means-tested benefits such as Universal Credit.
