Here are a couple of useful links from the .gov website. The site is updated regularly and I recommend that you add them as bookmarks to your browser as the pages change daily.

Stay inside if you can and please stay safe!

COVID-19: support for businesses
https://www.gov.uk/…/guidan…/covid-19-support-for-businesses

COVID-19: guidance for employees
https://www.gov.uk/…/guidan…/covid-19-guidance-for-employees