UK Landlord Forum / Life

Hi, I have a professional couple who want to rent a property from me.  The letting agents have carried out a 'Right to Rent' check on my behalf and claim that everything is in order.  Their work permits are 'time limited' and I am rather concerned that they expire THE DAY AFTER the AST term begins.  I have been told by the agent that so long as they are valid on the day that the actually tenancy begins that is sufficient to say that they have the required 'Right to Rent'. I was told that the legal position is that they have a period of 12 months in which to obtain their next work permit.  Just wondered whether anyone else had experience of a similar situation or has more knowledge than I have on this matter..  I'm worried as I'm only using the agent on a 'Tenant Find' basis and then the onus is on me, so to speak. 

https://www.gov.uk/check-tenant-right-to-rent-documents/further-checks

Are the tenant applying for a new work permit, have they? If they can't legally work, how are they affording rent in the mean time?