Physical exchanges are reported net, as are sales and purchases made with a common counterparty, as part of an arrangement similar to a physical
exchange. Similarly, where the group acts as agent on behalf of a third party to procure or market energy commodities, any associated fee income is
recognized but no purchase or sale is recorded. Additionally, where forward sale and purchase contracts for oil, natural gas or power have been
determined to be for trading purposes, the associated sales and purchases are reported net within sales and other operating revenues whether or not
physical delivery has occurred.