UK Power Networks: What They Cover for London Properties
UK Power Networks is the electricity distribution network operator for London and the South East, responsible for the cables, substations, and infrastructure that deliver electricity to homes and businesses across the capital. Understanding the boundary between UK Power Networks responsibilities and those of a private electrician helps London property owners and managers direct fault reports and queries to the correct organisation.
Who Is UK Power Networks and What Do They Operate in London?
UK Power Networks (UKPN) is the electricity distribution network operator for London, the South East, and the East of England. In London, UKPN operates all the electricity distribution cables, transformers, and substations that carry power from the National Grid high-voltage transmission network down through a series of voltage reduction steps to the low-voltage cables that serve individual London properties. UKPN owns and maintains the overhead and underground cables in London streets, the local substations and transformers, and the service cables that connect the street distribution network to the electricity meter at each property.
UKPN is a regulated distribution network operator and is distinct from the electricity supplier that bills London householders for their electricity consumption. The electricity supplier manages the commercial relationship and the meter, while UKPN manages the physical network infrastructure. If a London householder has a power cut or experiences a problem with the electricity supply to their property, the first call should be to the UKPN power cut reporting line on 105, which is the national number for reporting and enquiring about power cuts and electricity network faults.
UKPN Responsibilities Versus Private Electrician Responsibilities
UKPN is responsible for the electricity network up to and including the service fuse (also called the cut-out fuse) at the point where the supply enters the property. This cut-out fuse is sealed by UKPN and can only be operated by a UKPN engineer. The electricity meter, which in many London properties is being upgraded to a smart meter, sits immediately after the cut-out fuse and is the responsibility of the energy supplier or meter operator. Beyond the meter, the consumer unit (fuse board) and all wiring within the property is the householder or landlord responsibility, and any electrical work on this internal installation must be carried out by a registered electrician.
If a London property loses power and the consumer unit trip switches are in the on position, the fault may lie with the UKPN supply to the property rather than with the internal electrical installation. In this case, calling 105 is the correct course of action. If the consumer unit has tripped, resetting the relevant circuit breaker is the first step. If a circuit breaker repeatedly trips, an electrical fault within the internal installation is indicated, and a registered electrician should be engaged to investigate.
Reporting a Power Cut in London to UKPN
The 105 number is available 24 hours a day and connects callers to the relevant distribution network operator for their area. For London callers, this routes to the UKPN fault reporting team. The automated system will ask for the postcode of the property affected and will provide information on whether a fault is already known in the area and an estimated restoration time. UKPN publishes a real-time power cut map on its website and through its app, which shows the location and extent of known outages and the estimated restoration time for each.
For faults within the property, including a complete loss of power to the property while neighbouring properties have power, the investigation should begin with the consumer unit. Prestige Engineers provide emergency electrical call-out services across London for consumer unit faults, circuit failures, and other internal electrical installation problems, and can advise on the boundary between UKPN network faults and internal installation issues.
New Electricity Connections and Supply Upgrades in London
For new electricity connections to London properties, supply upgrades for EV charging or heat pump installations, and diversions of overhead or underground cables for building works, the application must be made to UKPN as the network operator. UKPN has a connections team that handles new connection applications, provides connection offers setting out the technical specification and charges, and carries out the network connection work. The internal electrical installation beyond the meter, including any new consumer unit, wiring, and final circuits, is carried out by a registered electrician once the UKPN network connection is in place.