Thousands of households lost electricity moments after a power station’s last remaining cooling towers were demolished.
Didcot A’s 375ft (114.3m) high towers were brought down using explosive charges at 07:00 BST.
Minutes later, people in the area said they had suffered a power cut and an online tracker showed more than 2700 postcodes were affected.
An electricity pylon near the site was seen on fire after the blast.
Scottish and Southern Electricity has been contacted for comment.
The coal-fired station was turned off in 2013 after 43 years in service.
Crowds gathered early to watch the controlled blast as Oxfordshire’s skyline changed forever.
The station’s northern towers were blown down after its three southern towers were demolished in 2014.
RWE Power, which owns the site, said it had planned the demolition over several months with its contractor Brown and Mason, liaising with the relevant local authorities.
An exclusion zone was set up around the site of the former coal-fired power station to keep members of the public safe, with RWE warning people not to attempt to view the demolition from close quarters.
A temporary footpath closure was in place, though there were no road closures.
Ahead of the demolition, RWE project manager Tiernan Foley said: “For many people the demolition will mark a significant day for both Didcot and Oxfordshire.
“We would like to thank the local community for their support and all the people who have worked at the site.”
The power station’s gigantic, concrete towers in the heart of Midsomer Murders country have stood in stark contrast to their surroundings and have divided public opinion.
In 2003, Country Life readers voted the landmark Britain’s third worst eyesore, but others have found the structures to be a source of inspiration for poetry.
Didcot A was commissioned in 1964 by the Central Electricity Generating Board (CEGB) before it was connected to the national grid in 1970.
The town’s railway line and proximity to the Thames also meant the location was right for the tonnes of coal and gallons of water the power station would require.
The 2,000 megawatt (MW) station operated until 2013, when RWE Power move to decommission it when new EU reduced emissions rules were brought in.
Owners RWE Npower had planned to clear the site by the end of 2017, but its plans were delayed when the site’s boiler house collapsed, killing four workers.
Ken Cresswell, 57, John Shaw, 61, , Michael Collings, 53, and Christopher Huxtable, 34, died in the major incident in February 2016.
It took more than six months for the four men’s bodies to be recovered, prompting criticism from their families.
The power station’s 655ft (199.5m) chimney – one of the tallest structures in the UK – will be demolished in the autumn.
Didcot Power Station timeline
1964 – Building starts
1970 – Didcot A begins commercial operation
1994 – Construction starts on Didcot B, a gas fired station
1997 – Didcot B begins commercial operation
2003 – Voted Britain’s third worst eyesore
2009 – Protestors climb chimney and stay there for two days
March 2013 – Didcot A closed
July 2014 – Three of its cooling towers are demolished
February 2016 – A major incident is declared after the boiler house collapses, and the body of worker Michael Collins is found
July 2016 – The remaining section of the boiler house is brought down using explosives
September 2016 – The bodies of Ken Cresswell, John Shaw, and Christopher Huxtable are recovered
December 2017 – An evidence file is passed to the Crown Prosecution Service by police
January 2018 – Thames Valley Police reveals it is considering manslaughter and gross negligence charges