If your Energy Performance Certificate expires, you are not automatically required to get a new one.
You will only need to get a new EPC if you intend to let to a new tenant, or wish to sell the property.
Once an EPC reaches the ten-year point and expires, there is no automatic requirement for a new one to be commissioned. A further EPC will only be required the next time a trigger point is reached, i.e. when the property is next sold or let to a new tenant. You can, however, set up an email reminder to notify you when your certificate expires.
Learn more about Energy Performance Certificates: EPC Certificates For Landlords 2022