CIPFA and the Institute for Revenues Rating and Revaluation (IRRV) have published some useful guidance on the new business grant payment arrangements

Current guidelines can be found below:
https://www.irrv.net/documents/72/council_papers/2020/April/Joint-Message-from-CIPFA-and-the-IRRV.pdf

Full guidance is expected to be released this week.

Guidance on the expanded retail discount was published last week. The Business Rate Information Letter (BRIL) has now also been issued:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/874286/BRIL_4_2020_Coronavirus_Response_Guidance.pdf