That brings an end to our live coverage of the 1,050 job losses at Tata steel.
For a comprehensive roundup of today's announcement click here.
This restructuring plan from the UK arm of Tata now has to be ratified by the company's board in India. They're expected to discuss it at their next board meeting in Mumbai in mid February
Speaking after Ms Sourby, Shadow Secretary of State for Business, Angela Eagle, said the announcement was "devastating news for the workers, their families and the close-knit communities who are affected".
Wales and Gloucester hooker Richard Hibbard, who was born in nearby Neath, paid tribute to the people of Port Talbot.
Business Minister Anna Soubry tells the House of Commons: "It is with regret I find myself having to update the house on further job losses in the steel sector."
She said the UK government's focus will be on helping workers back into jobs as soon as possible and supporting the steel industry.
Ex-steelworker and Neath Port Talbot councillor John Warman has arrived in London where he intends to give a letter to China's ambassador to the UK, Liu Xiaoming, in protest at the "huge amount of cheap steel imports from China".
He said: "I want him to make a direct appeal to his government.
"It's a personal appeal to him, man to man, about the effect it is having on the community. They're almost giving the steel away.
"The steel works are the backbone of the economy in this part of Wales.
"Everybody knows someone who works there or has a connection with the plant. It's the life-blood of the community."
Gareth Stace, director of trade body UK Steel, said: "This is deeply disappointing news and I am very concerned about the future of the plant and community. This is a site of critical importance to our national industrial infrastructure."
Speaking on a visit to a mosque in Yorkshire, David Cameron said: "This is obviously sad news about the job losses at Port Talbot and elsewhere. We'll work very closely with the company, with the local communities to do everything we can, to get people the training and the assistance they need. And we'll continue to help the steel industry.
"There is obviously this worldwide glut of overproduction of steel that's affecting countries right around the world but the steel industry has asked us for action on energy prices and we've taken that. They've asked us for action on procuring more British steel - we've taken action on that. They want us to take action within the European Union and we've done that as well but we'll continue to work with them.
"I want to have a strong British steel industry at the heart of our important manufacturing base."
Dave Hulse from the GMB union, said: "Once again this is more heartbreaking news for the steel industry and our members. Once again this demonstrates that this government is asleep when it comes to the serious problems that we are facing."
From BBC Wales reporter Ben Price in Port Talbot
Simon Atkinson from BBC News in Mumbai says steel is one of India's biggest businesses - but has similar problems to those in Wales.
"Tata is India’s biggest conglomerate, involved in everything from cars to hotels, tea to telecoms, salt to airlines.
"Steel though is one of its biggest businesses. A city built around it more than a century ago is now home to about 800,000 people.
"Today Tata Steel has operations in 26 countries. But in nearly all of those markets it is struggling. And the problems it has in Wales – including the falling steel price, sluggish global demand and the influx of cut-price Chinese steel exacerbating oversupply – are also ones it has to grapple with here in India.
"Just last week a ratings agency downgraded Tata Steel’s Indian business – because of its slowing of cash flow and plummeting profit.
"Tata’s management here in Mumbai is in damage limitation mode – and is trying to offload part of its European operations.
"Cutting jobs – making operations cheaper – might just make that a more attractive business to sell."
Tata has confirmed that 15 jobs will be cut at Trostre
Newport East MP Jessica Morden said that she was "seeking clarity on the impact for our community" as figures for specific job losses in Llanwern have not been announced by Tata
Welsh Secretary Stephen Crabb has described the idea of government taking a stake in Tata as "intellectually lazy".
Plaid Cymru has called for the Welsh government to consider taking a temporary stake. But Mr Crabb said the government does not have the expertise to help the company return to profit.
First Minister Carwyn Jones said he was not sure what would be achieved by buying a stake.
Plaid Cymru economy spokesman Rhun ap Iorwerth called on the Welsh government to "look with urgency at all options" to support the steel industry, including taking a temporary stake in Tata Steel to safeguard the remaining jobs.
"There is a bright future for steel in Wales, but urgent help is needed to get us through these difficult times," he said.
For the Welsh Liberal Democrats, South Wales West AM Peter Black said: "These are well-paid jobs and will prove difficult to replace."
"If the two governments do not act quickly and decisively together to start to put things right then I fear that there may well be more job losses," he added.
Anna Soubry, the UK government's Business Minister, said: “Even if we were to abolish business rates that would not solve the problems of Britain’s steel industry.
"Over-production in the world and under-consumption means the price of steel, like slab steel, has halved.
“We can ameliorate that and create a level playing field, but it’s the price of steel that’s fundamentally the problem. No government can solve that.”
A Neath Port Talbot council spokesman said: "Whilst not without warning, this news is no less devastating for the town of Port Talbot and the county borough.
"The steelworks makes a significant contribution, both directly and indirectly, to the economy of the region, and as such Neath Port Talbot council will work with Tata, the Welsh government and the UK government to do the best we can for the people affected by this announcement."
Alistair Ramsay from Metal Bulletin Research, told BBC News there was an erosion in global demand for steel last year - although China still managed to export 20 million tonnes. This had increased competition.
He said: "In some countries there's been a very aggressive blockading programme being put in place like in the US where a tonne of coated steel - the most popular material coming from China going to the US - gets charged three times more than its value on entry, making it redundant in the US."
Tata Steel has issued a statement following today's announcement.
Karl Koehler, chief executive of Tata Steel’s European operations, said: “I know this news will be unsettling for all those affected, but these tough actions are critical in the face of extremely difficult market conditions which are expected to continue for the foreseeable future.
"We need the European Commission to accelerate its response to unfairly traded imports and increase the robustness of its actions. Not doing so threatens the future of the entire European steel industry.
"And while we welcome progress on UK energy costs, the (UK) government must take urgent action to increase the competitiveness of the UK for its vital steel sector.
"This includes lowering business rates and supporting energy efficiency and anti-dumping cases so we can compete fairly."
Steel prices have fallen over six years
BBC Wales reporter Ben Price has spoken to people in the community
Welsh Secretary Stephen Crabb said: "The UK government will keep doing what it can to support a steel industry suffering intense pressures from cheap steel imports and a global slump in prices.
"That involves working with Tata to ensure they remain a significant presence in south Wales."
BBC Wales reporter Dafydd Morgan says security officers have pulled down a union banner erected at the steelworks site. Union says it will go back up.