The government has made a change to the Energy Performance Certificate (EPC) regulations and it is more than likely to affect both owner and your tenants. From the 1st April 2018, most landlords will be legally obligated to ensure that their privately rented properties have a minimum EPC rating of E.
This means that any landlord with an EPC rating of F or G will have to make modifications to their properties in order to raise their rating. if they fail to do so they run
If house will not have that minimum rate E you risk to be sanctioned with a fixed penalty up to £4000.
More information about new EPC requirements can read on ministry of housing communities and local government website