Grid-connected renewables, storage and the UK electricity market

This article is mainly a counterpoint to an article by Swift-Hook in the journal of Renewable Energy titled "Grid-connected intermittent renewables are the last to be stored" It also describes the four main distinct UK markets where electrical energy and services are traded, in order to provide a context for the discussion of renewable energy and energy storage in the UK electricity system. In Swift-Hook's article it was argued that "grid-connected intermittent renewables like wind energy will never be stored unless nothing else is available" and that "storage is counter-productive for fuel saving" We, however, find evidence that "grid-connected intermittent renewables" have been, and will continue to be stored when it suits the "UK market" to do so. Furthermore, Swift-Hook's article neglects the potential wider benefits that storage offers to UK energy policy's goals, in terms of reduced emissions (when used in conjunction with renewables) and enhanced security of supply.