David Cameron's foreign policy expertise questioned in Lord Ashcroft's biography

David Cameron's foreign policy expertise has been questioned in new claims from Lord Ashcroft's biography.

The toppling of Colonel Gaddafi in Libya is described as "the Prime Minister's Iraq", while he is also accused of "incompetence" over Syria.

The accusations are made in the second day of a Daily Mail serialisation of "Call Me Dave", co-authored by political journalist Isabel Oakeshott and billionaire peer Lord Ashcroft.

It follows Monday's revelations, when Mr Cameron was accused of being part of a debauched Oxford University dining society and being present at events where drugs were taken.

On Tuesday, the paper published extracts quoting a number of senior military officials and White House insiders casting doubt over the Conservative Party leader's judgement.

It quotes General Sir David Richards as telling Mr Cameron that "being in the Combined Cadet Force at Eton" did not qualify him to set tactics for complex military operations

Former Tory chairman Michael Ancram also told the authors that the intervention in Libya in 2011 played into the hands of terrorists.

"We now have a country which is ungovernable...with vast amounts of weapons from Gaddafi’s arsenal moved south of the border, arming Boko Haram," Mr Ancram said.

"They’re actually more of a threat to us than Gaddafi was at the time."

Baron Richards adds that the situation was not analysed properly.

The book also reveals the White House's shock when Mr Cameron lost a 2013 vote to take military action in Syria.

One Obama administration insider is quoted as saying: "It was one of those astonishing displays of incompetence that sort of leaves you wondering about how, you know, have we all got this far?"

In recent weeks, the Government has appeared to edge closer to a fresh vote on air strikes in Syria.

On Monday, Downing Street declined to comment on the book's contents.