Ms Clare O'Connor:

I have not seen analysis to show that specifically yet. To get the most in carbon savings that is again where the minimum energy performance standards will come in because they will trigger retrofitting for the least efficient homes, which are ultimately using the most carbon. We also really need to push heat pumps because ultimately the gas and oil being burned in any of these homes is causing emissions. We really need to look at decarbonisation of heating and legislation on that.