Distribution network operators (DNOs) are companies responsible for managing and maintaining the infrastructure that delivers electricity from the transmission system to homes and businesses. They ensure that power is distributed safely and reliably, overseeing the local electricity networks, including substations and power lines. DNOs play a crucial role in the energy supply chain, connecting consumers to the national grid and facilitating the integration of renewable energy sources. They also handle the maintenance and upgrades of the network, ensuring that it meets regulatory standards and can accommodate growing energy demands.