By ninemsn staff
Cocaine use is rampant at the exclusive clubs frequented by princes Harry and William and their close set of friends, an investigation has revealed.
A reporter from UK tabloid The Daily Mail went undercover to reveal what goes on behind the closed doors of the UK's most exclusive clubs.
One of these was the nightclub Boujis, where the princes have often been photographed with their girlfriends and "fast" set of acquaintances.
The undercover investigation showed the club was a haven for twenty-somethings seeking a coke-induced high.
On four occasions the reporter, who posed as a fashion student living off her millionaire father's money, swabbed the surfaces of toilet lids and toilet roll covers with a special cocaine identification kit.
The results immediately identified cocaine as the substance present.
In one instance, the toilet roll holders were reportedly smothered in large white chunks, which also tested positive for cocaine.
This was at the nightclub where Prince Harry once famously cavorted with a television presenter and was photographed with his hands over her breasts.
Boujis was also where the 23-year-old allegedly attacked awaiting paparazzi.
William was photographed at the club last week with Kate Middleton, confirming rumours of their rekindled romance.
Other clubs which have been affected by cocaine use and which are constantly overrun with celebrities have been forced to remodel their bathrooms.
At Mahiki whose clientele reportedly includes Sienna Miller, Kate Middleton, Princess Beatrice and the children of Richard Branson the owners have built toilet cisterns into the wall, eliminating a large flat surface to snort the drug off.
Attendants are also on hand to stop people going into the toilets in pairs.
But, like Boujis, drug users have made good use of a five-centimetre long, three-centimetre wide toilet roll cover, the report said.
Britain has the fastest-growing consumption of cocaine in the world climbing a massive 30 per cent in the last year alone.
A survey published last year found that nearly half the young professionals questioned had used the drug, a four-fold increase from a decade ago.