Independent Distribution Network Operators (IDNOs) design, develop, operate and maintain local electricity distribution networks, constructed by Independent Connections Providers (ICPs), under a licence granted by Ofgem.
- IDNO networks are directly connected to the Distribution Network Operator (DNO) networks or indirectly to the DNO via another IDNO
- Unlike the DNOs, that cover 14 geographical areas in the country, IDNOs are not restricted to a geographical region and can operate across the UK.
- Independent Gas Transporters (IGTs) design, develop, operate and maintain local gas transportation networks, constructed by Utility Infrastructure Providers (UIPs), under a licence granted by Ofgem
- IGT networks are directly connected to the Gas Distribution Network (GDN) or indirectly to the GDN via another IGT
- IGTs design and construct gas infrastructure and retain ownership of the networks. The license also enables IGTs to adopt newly built networks, designed and built by third parties
- Unlike the GDNs, which operate in distinct geographies, IGTs can operate across the UK.
- New Appointments and Variations (NAVs) design, develop, operate and maintain local water and wastewater networks for the benefit of those customers connected to them, under a licence granted by Ofwat.
- They generally provide water and wastewater to new housing estates, serving homes and some smaller businesses and apply to provide this on a site by site basis. All customers have guaranteed standards of service.
- They will compete to provide the ‘last mile’ water and wastewater services, alongside other utility infrastructure, such as gas and electricity networks.