0719R - Calculation of Energy Value of Gas

The Offtake Arrangements Document describes arrangements between Transporters for calculating the energy value of the gas in the network. The main driver for this Review Group is the UNC OAD Section F1 notice period available to National Grid to terminate the provision of the existing service to the Gas Distribution Networks (GDNs), however several developments such as the growth of biomethane injection into distribution networks, a need to review the process for attributing energy values from one offtake to another and questions about whether the UNC obligations sit with the correct party also direct that a review of these arrangements is required.