 The Renewable Heat Incentive (RHI) scandal related to the cost of a renewable energy scheme initiated by Arlene Foster during her tenure as Minister for Enterprise, Trade and Investment.The scandal came to light in November 2016, when Foster was First Minister of Northern Ireland.Foster refused to stand aside during the enquiry, ultimately leading to the resignation of Martin McGuinness, deputy First Minister, which, under the Northern Ireland power-sharing agreement, led to the collapse of the Northern Ireland executive in January 2017.