Chat about Novel Coronavirus - 2019-nCoV - COVID-19

Indeed, the guidance ( https://www.nhs.uk/conditions/coronavirus-covid-19/testing-and-tracing/what-your-test-result-means/ ) says:-

"
Negative test result

A negative result means the test did not find coronavirus.

You do not need to self-isolate if your test is negative, as long as:

• everyone you live with who has symptoms tests negative
  
• everyone in your support bubble who has symptoms tests negative
  
• you were not told to self-isolate for 14 days by NHS Test and Trace – if you were, see what to do if you've been told you've been in contact with someone who has coronavirus: https://www.nhs.uk/conditions/coronavirus-covid-19/testing-and-tracing/nhs-test-and-trace-if-youve-been-in-contact-with-a-person-who-has-coronavirus/
  
• you feel well – if you feel unwell, stay at home until you’re feeling better
  
  

If you have diarrhoea or you’re being sick, stay at home until 48 hours after they've stopped.
"

And that second link has:-

"
What to do when you get your test result

If you test negative (the test did not find coronavirus):

• keep self-isolating for the rest of the 14 days from when you were last in contact with the person who has coronavirus – as you could get symptoms after being tested
  
• anyone you live with can stop self-isolating if they do not have symptoms
  
• anyone in your support bubble can stop self-isolating if they do not have symptoms
  "
  
  

But the justification for doing it because of a supposed 1 in 5 chance of the negative result being wrong is just bollocks.