This dataset provides forecast and actual Winter Peak Gross Demands up to 23/24 and forecast and actual Winter Peak Relevant Demand from 24/25 by delivery years.

Under the Capacity Market (CM), Suppliers are obligated to pay a monthly CM Supplier Charge to cover the costs of Capacity Provider payments, where they have made a supply during the Peak Period. Up to and including Winter 23/24 this charge was apportioned across Suppliers by their share of the Total Gross Demand for the Peak Period within a Delivery Year. From Winter 24/25 onwards this charge is apportioned across Suppliers by their share of the Total Relevant Demand for the Peak Period within a Delivery Year. The Peak Period shall mean the Winter months between Nov – Feb (inclusive).

For Data for Winter 24/25 onwards 100% exemption for EII applies (Relevant Demand).