https://www.gov.uk/check-tenant-right-to-rent-documents/how-to-check
Right to rent checks continue in the same way as now until 30 June 2021 for citizens of the EU, Switzerland, Norway, Iceland and Liechtenstein.
Continue checking their passport or national identity card as before. For family members of EU, EEA or Swiss citizens, follow the usual guidance for documents you can accept for right to rent checks.
It’s against the law to ask EU, EEA or Swiss citizens to show that they have settled status or pre-settled status when starting a new tenancy.
You will not need to make retrospective checks for existing tenants from 2021.
In June 2021 , new guidance will be published covering how landlords can perform right to rent checks for EEA nationals.