A major power cut caused chaos across the country after it is believed that a generator at an offshore wind farm in Hornsea failed to connect.
Almost one million people across England and Wales experienced blackouts after there were issues with two generators, according to the National Grid Electricity System Operator.
Professor Tim Green, co-director of the Energy Futures Laboratory believes one of the generators was at Hornsea with the other at Little Barford in Cambridgeshire.
He said: “The first generator to disconnect was a gas fired plant at Little Barford at 4.58pm. Two minutes later Hornsea Offshore wind farm seems to have disconnected.
“This might be linked to disturbance caused by first generator failing; might not.
“We will need to wait for National Grid’s full technical investigation to get to bottom of that.”
The power cut stopped traffic lights from working, plunged Newcastle Airport into darkness, affected Ipswich Hospital and caused huge disruption on the railways during the busy Friday night commute.
Ofgem said on Friday night: “In any incident the priority is to get power restored to customers as quickly as possible. National Grid has now informed Ofgem that the system has been restored.
“However, Ofgem understands the frustration this power cut has caused consumers.
“Ofgem has asked for an urgent detailed report from National Grid so we can understand what went wrong and decide what further steps need to be taken. This could include enforcement action.”
A back-up generator failed at Ipswich Hospital after the power cut, according to a hospital spokeswoman.
The generator which was supposed to supply power to outpatient areas of the hospital did not work as expected.
“There were some issues with regard to our outpatient areas and the generator that provides cover (to them),” said a spokeswoman for East Suffolk and North Essex NHS Foundation Trust.
he said other generators “kicked in as was required” and “patients were kept safe and cared for throughout” the blackout which lasted about 15 minutes.
Around 300,000 UK Power Networks customers were affected in London and the South East, a spokeswoman said, and Western Power Distribution said around 500,000 people were affected in the Midlands, South West and Wales, with power restored to them all shortly after 6pm.
A spokeswoman for Northern Powergrid, which serves Yorkshire and the North East, said 110,000 of its customers lost power, while at least 26,000 people were without power in the North West of England, Electricity North West said.
Trains began to run out of King’s Cross late on Friday night after the station was shut down amid “apocalyptic” rush-hour scenes across England.
The first train bound for Peterborough left the central London station at around 9.30pm after all services were halted for several hours.
Passengers were filmed forcing their ways through the barriers in an attempt to get themselves on to the first northbound service.
Hull Trains services were also affected with the firm unable to get carriages in and out of London.
As a result the 6.48pm, 7.12pm and 8.30pm services were cancelled with more trains cancelled on Saturday morning too.
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