Question to the Department for Energy Security & Net Zero:

To ask His Majesty's Government whether Ofgem’s compliance audits for the Domestic Renewable Heat Incentive and the Non-Domestic Renewable Heat Incentive are selected through a randomised, stratified, risk-weighted or quota-based sampling methodology; and what statistical confidence level is used when extrapolating fraud and error rates to the wider scheme.

The Domestic and Non-Domestic Renewable Heat Incentive schemes each benefit from two audit programmes annually. They include both randomised and risk weighted methodologies with the ability to consider internal or external referrals. A 95% confidence level is currently applied when extrapolating fraud and error rates for the non-domestic scheme and 90% is applied for the domestic scheme.