Today in Focus Inside the mystery of the collapsed Chinese spy trial
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Oct 15, 2025 
Dan Sabbagh, Defence and security editor at The Guardian, dives into the mysterious collapse of a high-profile Chinese espionage trial. He discusses the March 2023 arrests of two suspects and sheds light on their roles and accusations under the Official Secrets Act. Sabbagh explores modern espionage tactics and the implications of recent legal changes, revealing the political tension between the UK and China. Should we be concerned about spies in Westminster? With evidence being questioned, the ramifications for UK-China relations remain crucial.
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Parliamentary Researcher Arrested
- Christopher Cash was a parliamentary researcher with a pass allowing movement around Westminster while focusing on China-related work.
- He worked for MP Alicia Kearns and was seen as a model employee until his arrest on suspicion of spying.
Teacher's Devices Spark Probe
- Christopher Berry, a teacher in Hangzhou, was stopped at the UK border and had his devices seized which triggered the investigation.
- Berry's devices led investigators to Cash because the two were close and frequently in contact.
Reports Reached Senior Chinese Leader
- Berry allegedly wrote 34 reports on UK politics that ended up with a powerful Chinese official.
- The Guardian's reporting identified the recipient as Politburo member Cai Qi, a senior Chinese leader.