Brexit drives UK power price divergence

One of the first palpable impacts of Brexit on the UK power market was seen on 5th January 2021, with the Day-Ahead auction prices decoupling for the evening peak between the EPEX & Nordpool exchanges. The difference comes as a result of separate auctions and the removal of market coupling for the UK DA market, and the return to explicit power flow allocation. This new regime was stressed early in the year as National Grid issued an Electricity Margin Notice amid cool temperatures and expected low wind generation. Although the intention is to work back towards implicit allocation, this is unlikely to be reintroduced until early 2022.