UK publishes AR8 CfD parameters and freezes administrative strike prices

The UK government published AR8 Contract for Difference parameters on 7 July, freezing administrative strike prices while restructuring the technology pot layout. Solar and onshore wind each gain one additional delivery year under the new framework. Load factors remain unchanged across all technologies, per pv magazine. Applicants must now hold a confirmed grid connection agreement before proceeding: a hard eligibility requirement that tightens access compared with earlier allocation rounds.

On the same day, Ofgem signed off on two tranches of rule changes for UK frequency response markets. The first tranche takes effect July 2026; the second follows in January 2027. A key change ties Dynamic Response availability windows to notification data submitted to the balancing market. A tiered penalty regime for assets missing availability targets was rejected in this round but remains under consideration for future rule changes, per pv magazine.

Together, the two decisions mark a busy regulatory day for UK power market participants: AR8 sets the commercial ceiling for the next renewables contracting round, while the frequency response changes tighten operational obligations for assets providing dynamic services.