In other news, UK PM David Cameron says the government is "doing everything it can" to save thousands of steel jobs - but warned there were "no guarantees of success".


Speaking after chairing crisis talks on Tata Steel's decision to sell its UK business, the PM said nationalisation was not the answer but the government was "not ruling anything out".


Ministers are under pressure to secure the future of the threatened plants.


Labour has urged ministers to "get a grip" and act now to help the industry.


It is understood the government wants reassurance Tata Steel will not close its plants before a buyer is found.Tata Steel's UK business - which directly employs 15,000 workers and supports thousands of others - includes plants in Port Talbot, Rotherham, Corby and Shotton.


The Port Talbot plant - which employs 5,500 people - is said to be losing 1m a day.