Taken from https://www.gov.uk/guidance/coronavirus-covid-19-advice-for-uk-visa-applicants-and-temporary-uk-residents?utm_source=1b9655f9-d25e-405b-b691-29aa736d7a48&utm_medium=email&utm_campaign=govuk-notifications&utm_content=immediate on 29 April 2020.
UKVI webpage: Coronavirus (COVID-19): advice for UK visa applicants and temporary UK residents (28 April 2020)
Home Office Documents