Witnesses will always be at risk in British courts

Our adversarial system gives barristers every incentive to trash people's reputations

Nigella Lawson, arrives at Isleworth Crown Court in London

Nigella Lawson case: How come celebs aren't stopped and searched?

Yesterday morning we were told that Nigella Lawson is not to be investigated for cocaine use. During the trial of her two former aides she had admitted taking the drug, but the police have said she will not be investigated "at this stage". Well there's a thing.

Nigella Lawson and Charles Saatchi during their marriage

They were all addicts... of the folding stuff

People under the prolonged influence of too much money tend to behave in ways that would cause them to shudder in other circumstances

Sisters Elisabetta (left) and Francesca Grillo, former personal assistants to Charles Saatchi and Nigella Lawson

Nigella Lawson and Charles Saatchi PA trial jury retires to consider verdict

Judge says ‘battle lines in this case are clearly drawn’, as Italian sisters stand accused of credit card fraud

Real life Breaking Bad: US meth dealer Walter White jailed for drugs and firearms offences

Judge says TV character’s namesake distributed an ‘extraordinary’ quantity of methamphetamine across Montana

25 students have been arrested in California following an undercover police operation which echoes the plot of 21 Jump Street, a Hollywood film in which Jonah Hill and Channing Tatum play young police officers who pose as high school pupils

21 Jump Street: Police arrest 25 students after posing as pupils for entire term

In events that echo TV series and film 21 Jump Street, officers in California posed as high school students to make the drug related arrests

Air France plane to Paris grounded in Venezuela following terrorist bomb threat

Security services received intelligence of plans to blow up a flight between Caracas and Paris

Review: 'Demons: our changing attitudes to alcohol, tobacco and drugs', By Virginia Berridge (Oxford University Press, £16.99)

A table published in the Lancet in 2007 ranked substances for harmfulness, and it made headlines when it placed alcohol ahead of crack cocaine and ketamine (“Special K”, to those who enjoy administering a horse tranquiliser on themselves). Tobacco was judged to be worse than cannabis, glue and solvents, LSD and ecstasy. Bar-room philosophers all over the land almost spilled their pints at the notion that they were hard-drug users.

Nigella Lawson used drugs every three days at family home, former assistant tells court

Nigella Lawson was today accused in court of failing to tell the truth in the witness box about her cocaine habit.

An average of one new 'legal high' goes on sale every week

Legal highs: Producers may have to prove substances are harmless before they can be sold

Home Office review will assess moves in New Zealand that put the onus on manufacturers to demonstrate their safety

Uruguay's Senate gave final congressional approval to create the world's first national marketplace for legal marijuana, an audacious experiment that will have the government oversee production, sales and consumption of a drug illegal almost everywhere else

If our politicians were brave enough, or even simply rational, they would follow Uruguay's lead and legalise cannabis

For the criminal underworld, the "war on drugs" is an extraordinary money-spinner

Nigella Lawson was seen enjoying a night out with the 66-year-old Satanic Verses author

Nigella Lawson takes a break for dinner date with Sir Salman Rushdie

Nigella Lawson was seen enjoying a night out with the 66-year-old author

A cultivator of marijuana smelling a plant at his house in Montevideo, Uruguay

In pictures: Uruguay's Senate creates world's first national marketplace for legal marijuana

The Uruguayan Senate voted on a government-sponsored bill legalizing the production and sale of marijuana. The bill has already been approved by the Chamber of Deputies and parliament's upper house, and makes Uruguay the first country in the world to regulate the cultivation and distribution of the soft drug.

Uruguay becomes first country to legalise marijuana trade

Government will control entire market 'from seed to smoke,' in a bid to curb addiction and drug violence

Elisabetta Grillo, foreground, and Francesca Grillo, left, deny abusing their positions by using credit cards loaned to them by Ms Lawson and her former husband Charles Saatchi

Sisters' spending on Saatchi credit cards was not checked, trial told

It wasn't our job to get involved, says finance director

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