It is a nickname for a scheme run in Northern Ireland which subsidised renewable fuel over fossil fuels. Technically known as RHI, the Renewable Heat Incentive, it is in the spotlight because it turned out to be far more costly to the taxpayer than planned. Sinn Fein's Martin McGuinness resigned as second minister over it, saying the DUP's Arlene Foster, the first minister, had a conflict of interest over the scheme.
What constitutes an offence of corporate manslaughter? Who can be prosecuted for it and what are the punishments?