David Cameron has admitted that he took drugs as a teenager while studying at the prestigious Eton College.
The former Prime Minister also said he later smoked it with his future wife Samantha and her friends.
However he has again refused to say whether or not he took cocaine.
He made the dope confession ahead of next weeks publication of his long-awaited book For The Record.
In an extract, published in The Times, Mr Cameron said he and two school friends used to row a boat to an island in the Thames, roll joints and spend a summers afternoon getting gently off our heads.
He managed to escape expulsion after getting caught but said that being summoned to the headmasters office was, at that time, the worst moment of my life.
Mr Cameron wrote: Trouble started brewing for me in my third year due to my growing sense of being mediocre, a mild obsession about being trapped in my big brothers shadow and a weakness for going with the crowd, even when the crowd was going in the wrong direction.
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These things, combined with the temptations of drinking, smoking and thrill-seeking, nearly led me to being thrown out of school altogether.
He recalled how, as a 14-year-old, he would smoke with his friends by heading away from the campus which is close to Windsor Castle.
He continued: Three of us used to hire one of the schools double scull rowing boats and head off to a small island in the middle of the Thames called Queens Eyot.
Being quite small back then, I was the cox.
Once there, we would roll up and spend a summers afternoon gently off our heads.
Police later told the school that Etonians were heading into Slough to buy the drugs and seven boys were expelled.
Mr Cameron was instead fined, grounded and stripped of privileges.
The PM met his wife on a family holiday in Calabria in 1992 as she was a former scRead More – Source