Ronald Maddison died after taking part in a chemical-agent trial at Porton Down in 1953. Sarin was applied to his forearm through layers of cloth. The original inquest was held in secret on national-security grounds and recorded misadventure. A new inquest in 2004 returned a verdict of unlawful killing.
The change between the two findings is central to the story. A death was known; the setting, evidence and official interpretation were harder to challenge. Secrecy changes who can examine an account and when. The Ministry of Defence’s own history now records the nerve-agent trial and the later verdict.
This file concerns a particular experiment and a particular death. It does not turn every volunteer study at Porton Down into the same event, nor establish a present-day operation. Read it alongside the separate aerial-trials file: laboratory exposure and releases used to study dispersal were different programmes.
The established record.
- 01
Maddison died during a trial at Porton Down in 1953.
- 02
The original inquest was secret and recorded misadventure.
- 03
The 2004 inquest returned unlawful killing.
How the story unfolded.
- 1953
A volunteer dies
Maddison dies following exposure in a Porton Down trial.
- 1953
A secret inquest
The first verdict is misadventure.
- 2004
The finding changes
A second inquest returns unlawful killing.
Where the evidence stops.
An inquest verdict is not a criminal conviction of a named individual. This case does not establish the intent or effects of every chemical-agent trial, or allegations about unrelated modern activity.
Read the original sources.
The source may establish a narrower point than the headline. Follow the specific finding, its date and its limitations.
What does an official account leave out when the public cannot examine the evidence?