Visa application centres remain open and closures depend on country restrictions.
"Updated information to explain that overseas services will remain open but dependent on local country restrictions, and that our in-country immigration services (UK Visa and Citizenship Application Services, Service and Support Centres and English Language Test centres) will remain open. Updated ‘If you’re applying to enter the UK or remain on the basis of family or private life’ section to explain that the period for requesting exceptional assurance has been extended."