The dataset provides detailed information about UK Power Networks' unplanned fault reporting under the Ofgem Interruptions Incentive Scheme (IIS). It includes key characteristics such as: Date/time fault start/end Number of customers affected Restoration stages Cause and main equipment involved Status of fault in terms of its exclusion from the IIS scheme due to it being a one-off /severe weather fault The upstream primary substation to the fault More information about the IIS can be found on Ofgem's website or this document: RIIO-ED2 Regulatory Instructions and Guidance – Interruptions