Which electricity DNO covers postcode SM3?

SM3 (Sutton) is distributed by UK Power Networks (South Eastern - SPN). For any street power cut call 105 free 24/7.

Who supplies mains water and gas in SM3?

Water: Thames Water; Gas network: SGN Southern.

SM3 District Sutton (Greater London)

Live power cut, broadband, mobile 5G, water & gas network telemetry for UK postcode district SM3.

All / Power Broadband Mobile Water Gas

Electricity DNO (105)

UK Power Networks (South Eastern - SPN)

Emergency: 105 / 105 / 0800 316 3105

Water & Sewerage Company

Thames Water

Support: 0800 316 9800

Gas Network (0800 111 999)

SGN Southern

Smell gas? 0800 111 999

Provider	Matched District / Area	Status / Affected	ETR / Updated
UK Power Networks (London - LPN)	E4 Walthamstow (Postcode E4) — UKPN INCD-647162-Z	2 properties	15 Nov 2026 at 5:17 am GMT
UK Power Networks (London - LPN)	EC1A Islington (Postcode EC1A) — UKPN MULT-59dc213a-f3b9-487f-a89f-fc6f32bb0…	DNO Active Fault	15 Nov 2026 at 2:17 am GMT
UK Power Networks (London - LPN)	NW10 Brent (Postcode NW10) — UKPN MULT-293bdf1a-1e1c-48a7-b271-51405741232e	DNO Active Fault	15 Nov 2026 at 2:17 am GMT
UK Power Networks (London - LPN)	EC1A Islington (Postcode EC1A) — UKPN MULT-23775b16-2d03-4b0a-9583-20e115ec9…	DNO Active Fault	15 Nov 2026 at 2:17 am GMT

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