In the previous section, we described examples of how regulation could unlock private investment in a more flexible electricity system. We then compared and contrasted those examples with actual regulation in some European countries today. In this section, we dive into the case of UK regulation in more detail to discuss recent policy announcements and what is needed to tilt investment into a more flexible future energy system. This section includes supporting commentary by one of the paper’s key sponsors, the UK’s Renewable Energy Association (REA).