The UK was hit by a massive power cut on Friday, as traffic lights were knocked out, trains came to a standstill and aircraft were grounded during rush hour.
Large parts of the country were without electricity following the power cut, utility suppliers said, with outages reported in the North West, South West, the Midlands and Wales.
The UK Power Networks tweeted on Friday evening: "We're aware of a power cut affecting large parts of London and South East.
"We believe this is due to a failure on National Grid's network, which is affecting our customers."
Train services in and out of London, including Thameslink, Southern and Gatwick Express saw delays and cancellations on Friday evening.
The UK has been hit by a massive power failure, with reports of trains, ports and traffic lights all being affected by what the National Grid said was a "failure" on their network.
Here's the latest from The Independent's Conrad Duncan.
London and south east hit by massive power cut as traffic lights and trains go down
We believe this is due to a failure on National Grid's network, which is affecting our customers,' says UK Power NetworksThese are the areas affected by the power cut, according to the UK Power Networks.
Up to date information on the cuts can be found here.
The Victoria Line is running again with severe delays, Transport for London has said.
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Other power cuts have been reported across the country.
Cheshire Police said they were "aware of a power outrage in the Ellesmere Port area, including in Great Sutton and Little Sutton."
And thousands of homes in Shropshire are without electricity, according to the BBC.
Meanwhile, the Press Association has reported a power cut at Newcastle Airport:
Scott McKenzie was travelling through Newcastle Airport when the power cut out for around 15 minutes, in what he was told by officials was "due to a wider problem in the region".
"It was a bit worrying to start - more so because various alarms were going off and staff clearly didn't quite know what was going on either," the 31-year-old from Cardiff told PA.
"Some of the spaces in the airport have little daylight - we were literally plunged into darkness and people were using their phones as torches to see and get around."
Mr McKenzie said the problem at the airport "seems to have been resolved" and Newcastle Airport said it is aware of the power issues but flights have not been disrupted.
British Transport Police officers are assisting at train stations due to "disruption caused by power issues".
Here's a statement from London North Eastern Railway on the services which are thought to be affected by power cuts:
"A number of trains have broken down between London and Stevenage. We suspect this has been caused by an electrical supply problem.
"Grand Central, Hull Trains and LNER services to and from London Kings Cross may be cancelled or delayed by up to 60 minutes.
"We don't have an estimate yet for when the problem will be resolved, however disruption is expected to continue until at least 8pm."
Videos have emerged from the cuts across the country earlier.
This was the scene from a power cut reportedly in a Waitrose in northeast London.
This was the scene from a power cut reportedly in a Waitrose in northeast London.
And this was reportedly the scene at Clapham Junction earlier.
East Midlands Trains are strongly advising customers to not travel towards or out of London St Pancras this evening.
A spokesperson for Northern Powergrid has said 110,000 of its customers lost power.
They said the problem was with the National Grid's transmission network, which distributes high voltage energy from power stations across the UK.
Those affected lost power between around 5.10pm and 6pm.
The power cuts were "quite spread apart, (which is) quite unusual", the spokesperson said.
Additional reporting by PA
The National Grid Electricity System Operator has said the power issue is "resolved".
The Department of Transport has released a statement on today's power cuts.
Transport for London are still working on bringing all traffic signals back online after a “low number” were affected by the power outage.
About 300,000 UK Power Networks customers were hit by the cut, a spokesperson has said.
The supplier, which covers London, the South East and the East of England, said it was first alerted to the issue at 4.53pm.
Power was restored to all customers by 5.21pm, according to the spokesperson.
About 500,000 people were affected in the Western Power Distribution area with power restored shortly after 6pm, according to the company.
The Western Power Distribution area covers the South West, South Wales, and the Midlands.
London Kings Cross Station has been closed to avoid any overcrowding, National Rail has said.
Here are a couple of updates for anyone on Great Northern Rail or Thameslink trains.
Due to the “severity of the disruption this evening”, National Rail has said there will be some disruption to services tomorrow.
More information on those disruptions will be posted as soon as possible.
Some good news and some bad news....
Good news: Transport for London has announced that all traffic signals have been restored in the capital.
Bad news: Major disruption to and from London Kings Cross, St Pancras and across the Great Northern and Thameslink networks is expected to continue until the end of the day.
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Traffic lights in the capital were also experiencing some problems and the Victoria Line on the London Underground was suspended, Transport for London said.
They tweeted on Friday evening warning people to be cautious when using the roads.
