You can read the CCC report in full here.
References:
¹BEIS Domestic Renewable Heat Incentive monthly deployment data January 2020
² BEIS Minister Written Answer, 29/10/2018 based on Analysis of National Housing Model input data, drawing from English Housing Survey 2014, Scottish Housing Condition Survey 2014, Welsh Housing Conditions Survey 2014
³BEIS Annual Fuel Poverty Statistics Report April 2020
⁴Savings and investments (nominal) of adults in low to middle income households (UK). Resolution Foundation 2020.
⁵TUC research January 2020