Please see below links to the gov.uk website which has all up to date COVID-19 guidance and also link to PCS website which has various circulars. Please check these sites daily.
https://www.gov.uk/coronavirus
The PCS website has PCS where I work drop down, and a list of all departments, select Department for work and pensions and will give further specific DWP advice.
If you are still in work, access the intranet and check HR guidance from the coronavirus link. this has a lot of Q&A for scenarios