UK talking 'intensively' with Tata Steel: David Cameron

London: The British government is "talking intensively" with Tata Steel and will work with it to create a shortlist of "serious" buyers of the Indian steel giant's loss making units in the UK, Prime Minister David Cameron has said.

"What we're doing is talking intensively with Tata to make sure they do everything they can to make sure this is a serious sales process," Cameron said while addressing the House of Commons yesterday.

"We need to work intensively with Tata and with those buyers to get that list down to those who are really seriously intending to bid for the business. It's a very short time table," he told MPs.

He was addressing Opposition Labour MP Stephen Kinnock, who had questioned: "Tata Steel has indicated that it wishes to complete the sale of its UK assets by the middle of June and that it wants a preferred bidder in place by the end of this month.

"Does the Prime Minister really think that that's a realistic time frame and that there'll be a credible process of due diligence? And what steps is the Prime Minister taking to ensure that Tata Steel delivers on its promise to be a responsible seller?"

The mid-June time-frame has been the general estimate on the sales time-line but a 'Financial Times' report today suggests that the company may extend this till after the EU referendum scheduled for June 23, when Britain votes on whether to remain in and leave the European Union.

Around the weekend of June 25-26, when Tata's board is expected to meet in Mumbai, is now understood to be the final deadline for any potential buyers to sign a sales agreement, the newspaper claims.

Two formal bids are in the running to acquire Tata Steel's UK assets so far - one by Indian-origin businessman Sanjeev Gupta's Liberty House group and the second by Excalibur Steel UK Limited,?a management buyout (MBO) team of former Tata Steel staff who have the backing of the Welsh government.

In his first interview since he took a leave of absence from Tata Steel UK to head the MBO, Excalibur Steel UK CEO Stuart Wilkie said he sees getting employees to invest around 10,000 pounds each in the business as a "moral element".

"I almost see it as a moral element. If we go to the City (financiers) to ask for tens or hundreds of millions of pounds in finance, as individuals we have to reflect do we back the business we work in? This business going forward has to have the courage and conviction to deliver its own results and its own future," he told 'ITV News'.

Liberty's bid is based on the company's 'Greensteel' business model and would involve a transition from steelmaking in blast furnaces to recycling steel in electric arc furnaces over time.

Codenamed "Project Greensteel Pluto", the takeover is aimed at ultimately powering steel-making through renewable energy sources.

Liberty had recently completed its acquisition of two Scottish plants earlier owned by Tata Steel and the firm's Long Products division based in Scunthorpe had been sold to Greybull Capital for a token 1 pound last month.

Central to the Indian steel giant?s assets in the UK is the Port Talbot steelworks in south Wales, which is the UK?s largest and employs around 4,000 workers.

Tata's remaining assets include sites at Newport, where more than 1,300 people are employed, and Rotherham, which employs 1,200.

Tata also has operations at Corby, Shotton and Teesside.