National Grid Electricity Distribution, formerly Western Power Distribution, runs the local network in the Midlands, South West England and South Wales. It does not sell electricity. Its parent, National Grid plc, also owns the high-voltage grid in England and Wales.

Electricity network
- Activities
- Distribution
- Customers
- 8.1 M· homes and businesses, 2025/26
- Smart meters
- 75%· GB homes, fitted by suppliers
- Minutes lost
- 27 to 54 min· per customer by area, 2025/26
- Interruptions
- 27 to 64· per 100 customers by area, 2025/26
- Network length
- 230,000 km· 2025/26
- Coverage
- 4 regions
- East Midlands
- West Midlands
- South West
- South Wales
The largest DNO in the UK by geography, serving over 20 million people. Minutes lost range from 27 in the East Midlands to 54 in the South West.
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