The government have produced minimum energy efficiency standards for rental properties.
For a rental property to stay rented, it has to reach a minimum energy rating of “E” or above. As of 1st April 2020 landlords must not rent or continue to rent a domestic property with an EPC efficiency rating of less than an “E” . For further details go to the GOV website Here
Or you can download the guidance notes from Elmhurst Energy below :