An Essex MP has called for an inquiry into the administrative proccess surrounding the closure of the Coryton Oil Refinery.
Basildon and East Thurrock MP Stephen Metcalfe raised the issue in the House of Commons.
Administrators announced the plant would close when a new buyer couldn't be found.
900 jobs are affected.
Mr Metcalfe told the House "The closure of Coryton was obviously not the outcome I fought for and the announcement was one that I had hoped never to hear.
"I believe it represents a sad day for the refining industry in the UK, a sad day for South Essex and above all it was a devastating blow for the hundreds of dedicated workers who have fought so hard to keep the refinery open."
Workers at Coryton oil refinery in Essex had another blow today, with the news that the Government won't be propping up the plant with public money.
The Department for Energy and Climate Change has decided not to apply to the European Commission to use state funds to bail it out.
850 jobs have been at risk since the refinery went into liquidation in January. The plant supplies about a fifth of London and the South East's fuel.
It's been announced that Coryton oil refinery will close. Glen Goodman has been looking at the future for the workforce and been speaking to Stephen Metcalfe, the MP for South Basildon and East Thurrock.
The Coryton oil refinery is to close, after administrators failed to find a buyer or the money needed to keep it going, putting around 850 jobs are at risk.
The refinery went bust in January and was put into administration by its Swiss owner, Petroplus.
The plant supplies 20 per cent of fuel in London and the South East.
Administrators PwC said the site would be wound down over the next three months after the challenge of raising the £625m needed to fund the refinery proved too much.
There are likely to be a "substantial" number of redundancies among the 500 workforce, PwC said.
Around 350 contractors will learn their fate in the next few days.
The Coryton oil refinery in Essex, which supplies 20 per cent of fuel in London and the South East, will close, putting around 850 jobs at risk, administrators said today. More details later.
It's emerged that a giant oil refinery that provides almost a quarter of all the south east's fuel could be closed down and turned into a storage facility.
The Coryton plant in South Essex went into administration in January and talks have continued to find a buyer.
One of the options could see it used for storage only which could mean the loss of up to 800 jobs and impact on the region's supplies. Iain McBride has more.
Coryton Refinery was plunged into administration by its Swiss owner Petroplus in February. It has been reported that a tanker reached the plant last week with enough crude oil to keep the site working for 11 days but the plant is unlikely to carry on operating beyond the end of this month.