The amendment is essential as it would make sure that the measures on energy levels in rented properties work in a meaningful way. I imagine that local authorities will be required to undertake much of the work on determining where landlords operate and who is doing  what in terms of energy efficiency. As my hon. Friend the Member for Hyndburn said, at the moment, local authorities have a fractured knowledge of what properties landlords rent out and their condition. The Housing Act 2004 gave local authorities a limited licensing power and obviously they how have a register relating to that, but that licensing applies only to houses in multiple occupation of a certain size—three storeys and five residents, I believe—so licences and therefore registers cover not just a limited amount of the total, but a tiny fraction of it.