Found dead: Eva Rausing, left, was discovered at her exclusive Chelsea home having apparently died of a drugs overdose. Her husband Hans, right, was arrested
* Hans Kristian Rausing, 49, was arrested by police on suspicion of drug possession
* Officers went to his home in exclusive Cadogan Place, Chelsea, where they found body of wife Eva, 48
* Rausing, whose father Hans has built up a £5.4bn fortune with packaging firm Tetra Pak, is tonight being questioned by Scotland Yard detectives
* Three members of staff at the house have been questioned by police
Hans Kristian Rausing, one of the heirs to to the multibillion pound Tetra Pak packaging dynasty, has been arrested in connection with the death of his wife Eva, after her body was found at their luxurious west London home.
The Metropolitan police said a body had been found at an address in Cadogan Place, Belgravia, one of the most exclusive streets in London.
Though Scotland Yard has not yet confirmed his identity, the 49-year-old is understood to be Rausing, whose Swedish grandfather Ruben Rausing invented the Tetra Laval milk carton in the 1960s. His father Hans senior was ranked by Forbes in 2010 as the 64th richest man in the world.
A post mortem was opened at 1pm on Monday at Westminster mortuary. The dead woman has not yet been formally identified, but sources confirmed the body was that of Mrs Rausing.
The five storey terraced house is in one of London's most expensive areas just off Sloane Street, between Knightsbridge and Chelsea. Officers could be seen guarding the front door last night, which was taped off.
The couple, who have four teenage children, have struggled for many years with addiction to hard drugs, narrowly escaping prison in 2008 after heroin and £2,000 worth of crack cocaine were found at their home. Mrs Rausing had been arrested after trying to smuggle several wraps of cocaine into a reception at the American embassy in Grosvenor Square.
As part of their caution, the couple were required to attend a four-month drugs rehabilitation programme, and they were prominent benefactors of a number of anti-drugs charities, even while they continued to struggle with their own addictions.
In a statement following her arrest in 2008, she said: "I have made a serious mistake which I very much regret," she said. "I intend to leave as soon as possible to seek the help that I very much need. I have made a grave error and I consider myself to have taken a wrong turn in the course of my life. I am very sorry for the upset I have caused. I thank my family and friends for their kindness and understanding."