The following guidance is now live on gov.uk.  It is intended for people with symptoms of coronavirus (COVID-19), including those with a diagnosis of coronavirus (COVID-19) infection, who must remain at home until they are well.

https://www.gov.uk/government/publications/covid-19-stay-at-home-guidance/stay-at-home-guidance-for-people-with-confirmed-or-possible-coronavirus-covid-19-infection