Future of Great Britain’s Gas Networks - Report for National Infrastructure Commission and

any remuneration of the gas networks for the existing RAV, as well as the wider costs of winding • The timing of the activities. [...] Cost Assumptions: Once the Transition Methodology was agreed with the Stakeholder Group, the transition modelling and cost assumptions and constraints as well as technical data for the we proceeded to the development of a set of cost assumptions against each of the steps in the modelling. [...] Customer’s internal gas system Customer gas equipment The diagram opposite shows the customer connection to the gas network and the various ownership The gas meter is boundaries for the key equipment: owned by the energy Existing ownership • Customers are connected to the low pressure distribution network via a service pipe. [...] • Under the current Pipeline Safety Regulation, the GDN has 12 months to come and make the disconnection permanent: • The GDN would cut and cap at the customer end of the service pipe, usually in the pavement or the driveway of the customer premises, with the service pipe left in situ. [...] • Use recompression rigs to withdraw gas from one side of the valve and reinject into the network the other side of the isolation valve, thus removing the natural gas from the downstream network and pushing it back up the pressure tiers.