Which electricity DNO covers postcode SL4?

SL4 (Windsor) is distributed by SSEN (Southern Electric - SEPD). For any street power cut call 105 free 24/7.

Who supplies mains water and gas in SL4?

Water: Thames Water; Gas network: SGN Southern.

SL4 District Windsor (Windsor and Maidenhead)

Live power cut, broadband, mobile 5G, water & gas network telemetry for UK postcode district SL4.

All / Power Broadband Mobile Water Gas

Electricity DNO (105)

SSEN (Southern Electric - SEPD)

Emergency: 105 / 105 / 0800 072 7282

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	KT23 Dorking (Postcode KT23) — UKPN MULT-5b9d2e29-e123-4a04-9867-2b54f98b9e80	DNO Active Fault	15 Nov 2026 at 1:45 am GMT
SSEN (Southern Electric - SEPD)	OX3 Oxford (Postcode OX3) — SSEN UJ3717	DNO Active Fault	15 Nov 2026 at 4:00 am GMT
SSEN (Southern Electric - SEPD)	SP11 Charlton (Postcode SP11) — SSEN 255910	DNO Active Fault	15 Nov 2026 at 6:45 am GMT
SSEN (Southern Electric - SEPD)	RH14 Wisborough Green (Postcode RH14) — SSEN UJ2404	DNO Active Fault	14 Nov 2026 at 11:59 pm GMT
SSEN (Southern Electric - SEPD)	RG14 Newbury (Postcode RG14) — SSEN UJ3149	DNO Active Fault	15 Nov 2026 at 2:00 am GMT
SSEN (Southern Electric - SEPD)	RG40 Wokingham, Finchampstead, Barkham (Postcode RG40) — SSEN UJ3556	DNO Active Fault	15 Nov 2026 at 5:00 am GMT
SSEN (Southern Electric - SEPD)	GU47 Sandhurst (Postcode GU47) — SSEN UJ3698	DNO Active Fault	15 Nov 2026 at 1:00 am GMT
SSEN (Southern Electric - SEPD)	RG27 Hook (Postcode RG27) — SSEN 254579	DNO Active Fault	23 Nov 2026 at 10:00 am GMT

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