The husband of dead millionairess Eva Rausing will appear in court today charged with preventing the lawful and decent burial of her body.

Police discovered the mother of four's body after they arrested her husband Hans Rausing - heir to the Tetra Pak billions - on suspicion of driving under the influence of alcohol or drugs last Monday.

Mrs Rausing, one of Britain's richest women, was found dead in a bedroom of the opulent Cadogan Place house in London's Chelsea which she shared with her 49-year-old husband.

eva rausing

Hans Kristian and Eva Rausing on their wedding day

Mr Rausing, the heir to a £5.4 billion fortune from his Swedish father's business, will appear at West London Magistrates Court today.

Police are treating the death of Mrs Rausing as "unexplained" and a post-mortem examination held last week failed to establish a formal cause of death.

An inquest into the her death opened at Westminster Coroner's Court on Friday.

There, Det Insp Sharon Marman of the Metropolitan Police said Mr Rausing was stopped on suspicion of driving under the influence of alcohol or drugs on July 9.

Officers found drugs in his car and when they searched the couple's home they discovered Mrs Rausing's body.

In 2008 Mrs Rausing was caught with drugs as she tried to enter the US Embassy in London.

Court documents revealed that Mrs Rausing, then 44, was carrying about 10g of crack cocaine, 2.5g of heroin and 2.35g of diethylpropion, a banned stimulant and appetite suppressant.

A further drugs stash - 220mg of diazepam, used to treat anxiety - was also found in her Renault Clio car.

The couple's townhouse was subsequently searched. Officers found 5.63g of crack cocaine, 2.9g of heroin and almost 52g of cocaine.

Paying tribute to his daughter, Mrs Rausing's father Tom Kemeny said she had interrupted her own drug treatment to help Mr Rausing.

He wrote: "At the time of her death her overriding concern was for the safety of her beloved husband, for whom she interrupted her own treatment to return to London in an attempt to take him back with her to California, but tragically to no avail."

Mr Kemeny described his daughter as "a beautiful, generous, and fun daughter, wife, mother, sister and aunt" and described Mr Rausing as his "son".

He wrote: "Eva and Hans Kristian adored each other and their four beautiful children. When not in London they would have family holidays with their cousins and extended family, without any glitz or glamour.

"Eva and Hans Kristian were a devoted and loving couple for the 21 years they spent together. They benefited thousands of lives through their personal involvement and philanthropic activities.

"They bravely battled their demons and supported each other and Eva will be a devastating loss to our beloved 'son' Hans Kristian, whom we love unconditionally with all our hearts."

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  • This photo of Nov. 26, 1996 shows Eva Rausing, right, and her husband Hans Kristian Rausing at Winfield House, London, the residence of the US ambassador to the UK attending the Glamour America Fashion Show and lunch. One of Britain's richest women, American-born Eva Rausing, was found dead in her west London home and a man was arrested in connection with the case, British police say, adding that an autopsy had failed to uncover a formal cause of death. Rausing, 48, was the wife of Hans Kristian Rausing, heir to the TetraPak fortune his father built by creating a successful manufacturer of laminated cardboard drink containers. (AP Photo/Alan Davidson/The Picture Library Ltd)

  • Taken with a fisheye lens, a photo shows a police officer standing guard outside the home of Britain's richest women, right, American-born Eva Rausing who was found dead in her home in Belgravia, London, Wednesday, July 11, 2012. (AP Photo/Sang Tan)

  • This photo taken from PA video shows police outside a house in Cadogan Place, Chelsea after the body of Eva Rausing, a member of the family behind the Tetra-Pak drinks carton empire and one of the richest women in Britain was found, Tuesday July 10, 2012. (AP Photo/PA Video, Leanne Rinne)

  • This photo taken from PA video shows police outside a house in Cadogan Place, Chelsea after the body of Eva Rausing, a member of the family behind the Tetra-Pak drinks carton empire and one of the richest women in Britain was found, Tuesday July 10, 2012.(AP Photo/PA Video, Leanne Rinne)

  • A Police investigation officer, sheltering from the rain with a folder, arrives at the home of Britain's richest women, American-born Eva Rausing who was found dead in her home in Belgravia, London, Wednesday, July 11, 2012. (AP Photo/Sang Tan)

  • Police tape lines the outside of the house of Eva Rausing in Knightsbridge on July 10, 2012 in London, England. It has been reported that the body of Mrs Rausing, the wife of Tetra Pak heir Hans Kristian Rausing, was found here yesterday. (Photo by Peter Macdiarmid/Getty Images)