DAVID Cameron is snobbish, Nick Clegg arrogant and William Hague sneaky.

These are the views of Sidney Blumenthal, an unofficial adviser to US presidential hopeful Hillary Clinton.

They are contained in the latest tranche of Mrs Clinton's emails to be released under US freedom of information laws after it emerged the Democrat politician used a private server for government business when she was US Secretary of State.

The emails show that she responded enthusiastically to receiving them, saying she had shared them with her husband, Bill - the former President - who thought they were "brilliant", adding: "Keep 'em coming when you can."

In what is likely to be music to the ears of Nicola Sturgeon and Jeremy Corbyn, one email from June 2010 revealed Mr Blumenthal as saying the Lib-Con Coalition's spending cuts meant the UK had little to offer the US and suggested that Mr Cameron would live to regret his commitment to austerity.

"On economic policy, the UK is no partner and no bridge to Europe," wrote Mrs Clinton’s ex-advisor. "At no other time since World War II have the US and UK governments been at such odds over international economics."

He added: "Cameron must be let alone to receive the consequences (within 18 months) of his ideologically driven economics."

In another message sent the previous month while the Coalition negotiations were taking place between the Tories and the Lib Dems, Mr Blumenthal said that whatever the shape of the new UK Government that emerged, it would be "remarkably weak, flimsy and fly apart within weeks".

He urged Mrs Clinton to prepare herself to deal with Mr Hague, who, he said was “deeply anti-European and will be disingenuous with you".

Mr Blumenthal described the mood within the Conservative Party as "acrid and anxious" with the "Tory moneyman" Lord Ashcroft - whom he described as "evil" - said to be furious at Mr Cameron's failure to secure an outright election victory.

Meantime on the Labour side, the ex-advisor described Lord Mandelson as playing a "cynical double game", plotting to replace David Miliband as Foreign Secretary if they managed to stay on in government while at the same time offering to support him if he ran for leader.

However, his strongest remarks were reserved for Mr Clegg, who he said was determined to form a coalition with the Conservatives even while he was also in talks with Labour.

"His inner Tory magnetically draws him to his heritage," he wrote.

"Clegg has also misplayed almost every turn, presented with big chances and blowing them through a combination of inexperience...and inbred arrogance (from no less a privileged background than Cameron, though seeming less snobbish because he went to Westminster instead of Eton and has a less pronounced upper class accent)."

The release also includes a rueful email from David Miliband, thanking Mrs Clinton for her support after he was defeated by his brother, Ed, in the election for the Labour leadership.

"Losing is tough,” declared Mr Miliband. “When you win the party members and MPs, doubly so. (When it's your brother...)," he added.