Government scientists secretly removed body parts from a national serviceman who died after taking part in nerve gas experiments, a new inquest has been told. Up to 200 separate samples were taken from 20-year-old Ronald Maddison's brain, spinal cord, heart and skin - without his family's permission - days after he died at Porton Down, Wiltshire, the government top-secret chemical warfare research base, in 1953. The body parts have since been used in a number of experiments by scientists researching the effects of toxic chemical agents on human tissue. The original inquest, held in secret in 1953, found that Leading Aircraftman Maddison's death was accidental, but the new inquest will examine fresh evidence and decide whether the original verdict still stands. Mr Maddison ... was among hundreds of national servicemen who volunteered in the 1950s and '60s to take part in tests at Porton Down in the belief that they were helping scientists find a cure for the common cold. The airman died less than an hour after 200mg of the highly toxic Sarin nerve agent was placed on layers of cloth on the inside of his arm.