An unofficial biography about the British Prime Minister has made a series of claims about David Cameron's alleged behaviour while in Oxford University.

Extracts from the book 'Call Me Dave' - which was written by the Conservative donor Lord Ashcroft - are published in the Daily Mail today.

They detail a series of claims that David Cameron smoked cannabis - was involved in bizarre initiation rituals - and that he knew about Ashcrofts's offshore tax status.

A Downing Street Spokersperson says he will not dignify the allegations which come just two weeks before the Tories autumn conference.

I've been speaking to GRN Reporter in London Christopher Walker about the allegations: