Labour leader Jeremy Corbyn is demanding the recall of Parliament to discuss the crisis gripping the steel industry.
He has written to Prime Minister David Cameron, calling for a debate on the threat to the steel industry, and steel-making at Port Talbot, following the shock decision by Tata to sell its UK assets.
Mr Corbyn said: "The news that Tata is preparing to pull out of steel-making in Britain puts thousands of jobs across the country and a strategic UK-wide industry at risk. MPs must have the chance now to debate the future of steel and hold ministers to account for their failure to intervene.
"Steelworkers and their families will be desperately worried about the uncertainty. The Government is in disarray over what action to take. Ministers must act now to protect the steel industry, which is at the heart of manufacturing in Britain and vital to its future."