Who supplies the GU postcode area?
Electricity distributor, gas network and water wholesaler for GU — the fixed infrastructure companies for this postcode area, and how they differ from the supplier on your bill.
Electricity distributor
The GU postcode area is served by UK Power Networks and Scottish & Southern Electricity Networks (South Eastern England / Southern England), MPAN distributor IDs 19 or 20. This is the company that owns the wires and substations here and responds to power cuts — call 105, free, from any phone. It is not who you pay for electricity.The GU (Guildford) postcode area sits on the SSEN Southern England / UK Power Networks South Eastern England boundary. West Surrey is generally SSEN territory; towns nearer Kent and Sussex can be UK Power Networks.
Gas network
GU is served by SGN (Southern England (Sussex, Kent, Hampshire, Surrey)). If you smell gas, leave the property and call 0800 111 999, the National Gas Emergency Service, free and staffed 24 hours a day, the same number regardless of which network covers your address.
Water wholesaler
Thames Water is the water and wastewater wholesaler for GU. Household customers cannot switch wholesaler; non-household (business) customers can switch retailer under the Open Water market while Thames Water remains the fixed network operator underneath. Leak line: 0800 714 614. Emergency: 0800 316 9800.
Price cap for South Eastern England, 1 October – 31 December 2026
GU falls in Ofgem's South Eastern England price-cap region. The Direct Debit single-rate cap here:
| Fuel | Unit rate | Standing charge |
|---|---|---|
| Electricity | 26.88p/kWh | 52.32p/day |
| Gas | 8.05p/kWh | 29.26p/day |
Great Britain average electricity unit rate for comparison: 26.32p/kWh. On Ofgem's typical consumption values (2,500 kWh), that is roughly £863/year for electricity alone. Full payment-method breakdown on the energy price cap page.
Distributor is not supplier
Everything above is your fixed network infrastructure — it cannot be switched and has no billing relationship with you. Your energy supplier is the separate, competitive company you actually pay, and you can switch it at any time using Ofgem's find my supplier guidance if you've lost track of who that is. On the gas side, registrations are held centrally by the Meter Point Administration Service — your supplier can look this up for you using your MPRN.
- UK Power Networks and Scottish & Southern Electricity Networks — the MPAN distributor IDs are 19 or 20. The GU (Guildford) postcode area sits on the SSEN Southern England / UK Power Networks South Eastern England boundary. West Surrey is generally SSEN territory; towns nearer Kent and Sussex can be UK Power Networks.
Send us one bill. We'll send back every overcharge — and the cheapest legitimate replacement.
Whether you run a Mayfair restaurant group or rent a flat in Salford, the audit is the same and the fee is the same: nothing, unless we save you money.