Inquiry head baffled by workings of department behind NI renewable heat incentive

The chair of a public inquiry into Stormont's botched green energy scheme has questioned whether a key department run by DUP leader Arlene Foster was dysfunctional.

Sir Patrick Coghlin expressed concern at the working practices within the Department of Enterprise, Trade and Investment (Deti) at the time when Mrs Foster made a decision in 2011 to introduce the ill-fated renewable heat incentive (RHI) scheme.