As used for gas, the system of high pressure pipes and other equipment owned and operated by National Gas Transmission (formerly called National Grid Gas (NGG)). The NTS comprises 7,600 kilometres of pipes and over 20 compressor stations. The NTS transports gas from the beach to sources of demand, including the gas distribution networks (GDNs), gas fired power stations and industrial users. For more information see Practice note, Downstream gas industry: overview.