These Regulations apply to Great Britain and amend the Renewable Heat Incentive Scheme Regulations 2011 (the “2011 Regulations”) and the Domestic Renewable Heat Incentive Scheme Regulations 2014 (the “2014 Regulations”). They make a number of changes to the 2011 Regulations including: aligning biomass tariffs; amendments to biomass tariff tiering; and changes to the total expenditure, technology-specific expenditure and related figures for assessment dates from 31st October 2017. They make a number of changes to the 2014 Regulations including: limits on the maximum amount of heat that is eligible for support; increasing the tariffs for all technologies except solar thermal; changes to the technology-specific expenditure and related figures for assessment dates from 31st October 2017.