Home Office
This is advice for visa customers and applicants. If you’re in the UK and your leave expires between 24 January 2020 and 31 May 2020 your visa will be extended to 31 May 2020 if you cannot leave the UK because of travel restrictions or self-isolation related to Coronavirus.
They have also set up a Coronavirus Immigration Help Centre.
Phone: 0800 678 1767 (Monday to Friday, 9am to 5pm)
Email: CIH@homeoffice.gov.uk