DC is embarking on their first student flatshare. Contracts on the verge of being signed. The property advert said it had a EPC rating of C, but now we've checked we can see it is actually an F. It doesn't appear to have any exemption to recent rule changes that require a minimum of E, so it seems to be illegally let. Can the tenants insist the landlord makes the necessary upgrades? It has no thermostat or double glazing. It also isn't elligible for the price cap (as it's a community heating scheme) so the estimated annual bill just for heating and hot water is £3600 between 5 tenants!