Question to the Department for Business, Energy and Industrial Strategy:

To ask the Secretary of State for Business, Energy and Industrial Strategy, how much Government and supplier obligation energy efficiency investment there was in each year between 2012-13 to 2016-17; and how many homes were insulated under Government programmes in each of those years.

Data are published for the number of measures installed and the total investment in supplier obligations prior to the start of the Energy Company Obligation in 2013 but the data are not readily available to determine the number of homes insulated, nor investment by year, in those years.

Investment under ECO (from 2013-14) is shown in the table below [1], [2].

The number of homes insulated under ECO (from 2013-14) meanwhile is provided below [3]:

[1] Note that suppliers front loaded delivery against their ECO obligations, meaning spending was higher than BEIS estimated for 13-14 and 14-15, but lower in the subsequent years. Had suppliers not front loaded delivery (i.e. delivered at a constant rate over this period), supplier spend would have been around £1.4bn during 13-14 and around £860m pa between 14-15 and 16-17

[2] Source https://www.gov.uk/government/statistics/household-energy-efficiency-national-statistics-headline-release-september-2017 (note the figures have been adjusted for inflation)

[3] Source: as above. These figures differ from published data in table 1.2.1a since the question asks for the number of homes insulated in a year whereas table 1.2.1a will only count a home once regardless of the number of times it received an insulation measure post May 2015.