The Electricity System Operator (ESO) may “snatch defeat from the jaws of victory” if it is careless in applying proposals to penalise participants who fail to deliver for the Demand Flexibility Service. That is the view of the founder and chief strategy officer of frequency response service Flexitricity, who has raised concerns over the ESO’s service design proposals for the future of the DFS, which it recently revealed will become a year-round service.