Information on the final number of households assisted under the scheme from 1 April 2011 to 31 March 2012 will not be known until Ofgem have conducted a review of suppliers' spending in that year.Around 660,000 households have already received a discount under the core group element of the scheme in 2011-12. The Department of Energy and Climate Change published an impact assessment in February 2011 for the scheme which estimated that:"The broader group element of the scheme will assist a minimum of 26,000 households in 2011-12.""The legacy spend element of the scheme will assist up to 1.5 million households in 2011-12."These estimates assume suppliers will spend £130 million on legacy spending. If suppliers choose to spend less than this, they will be required to assist more broader group households this year.