SP Energy Networks, the grid arm of ScottishPower (Iberdrola), runs the local network in central and southern Scotland, Merseyside, Cheshire, North Wales and North Shropshire, plus a transmission network. It does not sell electricity: customers pay their supplier.

Electricity network
- Activities
- DistributionTransmission
- Customers
- 3.55 M· 2 M in Scotland, 1.5 M in England and Wales, 2025
- Smart meters
- 75%· GB homes, fitted by suppliers
- Minutes lost
- 26 to 35 min· per customer by area, 2024/25
- Interruptions
- 29 to 31· per 100 customers by area, 2024/25
- Network length
- 107,700 km· 2025
- Coverage
- 2 regions
- Central Scotland
- Southern Scotland
- Merseyside
- Cheshire
- North Wales
- North Shropshire
Glasgow, Edinburgh and Liverpool hold 43% of customers. Reliability figures come from Ofgem and are provisional.
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