A cousin of Manchester City owner Sheik Mansour has failed in a stunning £2billion proposal to buy Liverpool.

Sheik Khaled Bin Zayed Al Nehayan, an Emirati member of the family who govern Abu Dhabi, approached representatives of Liverpool's owners over the course of several months in late 2017 and into early 2018.

He then made a £2bn offer that would have constituted the most expensive takeover in the history of football.

Sheik Khaled Bin Zayed Al Nehayan approached representatives of Liverpool in 2017-18

He is a cousin of Manchester City owner Sheik Mansour, but does not possess his wealth

Sheik Khaled, although he does not possess the immense wealth of City's billionaire owner Sheik Mansour, is one of the most successful entrepreneurs in the Gulf states.

Midhat Kidwai, the managing director of Sheik Khaled's conglomerate of companies, also met Liverpool chairman Tom Werner in New York.

Sportsmail accessed documents outlining the buyout that would have been a joint venture between Sheik Khaled and a minority stake Chinese partner.

The £2bn valuation, which preceded Liverpool's run to the Champions League final and recent transfer outlay on goalkeeper Alisson and defender Virgil van Dijk, would have broken the record for a buyout of a football club.

He met with Liverpool chairman Tom Werner (right) but failed with his £2billion proposal

Liverpool insisted on Thursday night that discussions with the sheik eventually failed

Manchester United, listed on the New York Stock Exchange, are valued at £3.1bn and Stan Kroenke's buyout of Arsenal recently took the club's overall estimated valuation to around £1.8bn.

Liverpool insisted on Thursday night that discussions eventually failed and added that although Werner met Kidwai in New York, the deal never reached the stage where major shareholders John W Henry or Michael Gordon met the Abu Dhabi investors.

It is, however, clear that Liverpool's owners, Fenway Sports Group, are actively seeking investment to transform the club into a superpower capable of rivalling the world's richest both commercially and in the transfer market.

FSG have instructed the American firm Allen & Co to attract investment and the company's managing director Stephen D Greenberg entered into prolonged talks with Sheik Khaled as the Abu Dhabi investor pursued a takeover of the club.

The valuation preceded Liverpool's run to the Champions League final under Jurgen Klopp

Liverpool's owners, FSG, are actively seeking investment to transform the club

One email from Greenberg extended an invitation for the Sheik's representatives to meet in New York.

The proposal suggested by the Sheik to Greenberg states that a '£2bn valuation' was agreed for '100 per cent of the club'.

Sportsmail has also seen a further document between Bin Zayed International — the Sheik's firm — and Alternative Advisors, a Swiss hedge fund where Sheik Khaled sought help to raise £750m from investors.

The agreement was signed on January 22, 2018 and it says: 'The client wishes a financial partner for the acquisition of a British football club.

'Client has confirmed to AA that the current shareholder of the club agreed to sell 100% of the share of the club on the basis of a £2bn valuation.'

Liverpool categorically deny that an agreement was reached, although a chain of emails shows Greenberg repeatedly chasing Kidwei for proof of funds.

They want to transform the club into a superpower capable of rivalling the world's richest

The proof, it would appear, did not emerge and the £25m deposit as a downpayment for the deal, due to be paid by the end of December last year under the terms of the proposal, did not arrive.

Liverpool insist all talks closed down in late January. A club statement said: 'FSG have been clear and consistent: the club is not for sale.

'But what the ownership has said, again clearly and consistently, is that under the right terms and conditions we would consider taking on a minority investor, if such a partnership was to further our commercial interests in specific market places and in line with the continued development and growth of the club and the team.'

Kidwai, the managing director of Bin Zayed International, did not respond to a request for comment.