105
Free national fault line
Free, 24/7
UK Power Networks
Your DNO
serves Greater London
33+
towns covered
incl. Westminster, Camden, Islington
up to £150+
Ofgem compensation
for cuts over 24h
Live outage map for Greater London
The map shows incidents reported by users in real time, centred on Greater London. Zoom in on your street to check whether a cut is your home only or a wider network fault — when neighbours are also dark, it is a UK Power Networks job.
32 boroughs across the Thames basin, densely built and largely underground for power purposes. Weather rarely causes London outages directly; summer heatwaves can derate cables and cause localised trips during demand peaks. The biggest fault risk is third-party cable strikes during construction.
Live Power Outages in the UK
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Report a power cut in Greater London
Seeing a cut the map hasn't caught yet? Add it in seconds. Your report is anonymous and appears on the live map above so neighbours in Greater London know what's going on.
Thank you. Your report has been submitted and will help others in Greater London.
Reports are anonymous. We use your address to place the marker on the map and never display your personal details.
Power cuts by town in Greater London
Pick your town for local outage reports, the live map and your network operator's fault line.
Why the power goes out in Greater London
Greater London is served by UK Power Networks across all 32 boroughs plus the City of London, with the most complex underground network in the UK and some of the fastest fault response times anywhere in Europe. 32 boroughs across the Thames basin, densely built and largely underground for power purposes.
Weather and terrain. Weather rarely causes London outages directly; summer heatwaves can derate cables and cause localised trips during demand peaks. The biggest fault risk is third-party cable strikes during construction.
How the network is run. UKPN's London network has triple redundancy in central zones — when one cable fails, supply normally switches automatically to a parallel feed. The 2003 South London blackout remains the largest unplanned UK cut in living memory.
A local quirk worth knowing. London's deepest power cables sit 35 metres below the streets near Bank — accessed through dedicated maintenance tunnels and not via street excavation. A fault here means a longer-than-average restoration.
What to do when the power goes out at home in Greater London
Check whether neighbours are affected
Look at the street lights and the houses opposite. If they're on, your fault is inside your home — check the consumer unit. If they're out too, it is a UK Power Networks network fault: call 105.
Dial 105 or 0800 31 63 105
Have your full postcode ready. Ask the operator for an estimated time of restoration (ETR) and a fault reference number — both make any later compensation claim faster.
Unplug sensitive electronics
Unplug TVs, routers, computers and consoles to protect them from a surge when supply returns. Leave one light switched on so you'll know visually when the power is back.
Log start and end times
A cut over 24 hours in normal weather entitles you to £75 from UK Power Networks under Ofgem's Guaranteed Standards. Severe weather has higher thresholds and a £2,000 cap. Keep a written log with photos — most payments arrive automatically within 10 working days.
The Selectra expert answers your questions on power cuts in Greater London
Always to your Distribution Network Operator, not your supplier. In Greater London that is UK Power Networks. Dial 105 (Free national fault line) — free, 24/7 — or call UK Power Networks directly on 0800 31 63 105.
Weather rarely causes London outages directly; summer heatwaves can derate cables and cause localised trips during demand peaks. The biggest fault risk is third-party cable strikes during construction. UKPN's London network has triple redundancy in central zones — when one cable fails, supply normally switches automatically to a parallel feed. The 2003 South London blackout remains the largest unplanned UK cut in living memory.
Yes. Under Ofgem's Guaranteed Standards of Performance, domestic customers in Greater London receive £75 after 24 hours off in normal weather, plus £40 every additional 12 hours up to £300. Severe-weather events have higher thresholds and a £2,000 cap. Payment is normally automatic from UK Power Networks within 10 working days — claim within 30 days if it doesn't arrive.
UK Power Networks announces planned cuts by letter (and increasingly text or email) 2 to 8 days in advance. Most run 8am to 6pm and last 2 to 8 hours. Planned cuts do not qualify for Ofgem compensation unless your DNO failed to give adequate notice (a £40 payment applies then).
Power cuts in nearby areas
Other counties close to Greater London — useful if your storm or fault crosses council boundaries.
City of London
UK Power Networks
Hertfordshire
UK Power Networks
Surrey
SSEN
Bedfordshire
UK Power Networks
West Sussex
SSEN
East Sussex
UK Power Networks
Buckinghamshire
SSEN
Essex
UK Power Networks
Other counties served by UK Power Networks
Same operator, same emergency number, similar restoration patterns and compensation framework.