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Security Service
03 July 2025
Type
Written Ministerial Statement
Department
Home Office
At a Glance
Issue Summary
MI5 provided incorrect evidence to the High Court, which misled various oversight bodies about Agent X's status as a Covert Human Intelligence Source.
Action Requested
The government has accepted the need for a robust and independent investigation. An internal review by the Attorney General on how MI5 prepares and presents evidence is underway, alongside an official review of wider issues raised by this case. Director General Sir Ken McCallum has initiated a learning and response programme within MI5 to improve its processes.
Key Facts
- MI5 provided incorrect evidence about Agent X's status as a Covert Human Intelligence Source.
- The High Court criticised MI5 for providing evidence in a piecemeal manner.
- A robust and independent investigation will take place.
- An internal review by the Attorney General is being conducted to improve how evidence from MI5 is prepared and presented.
- Director General Sir Ken McCallum has initiated a wide-ranging learning and response programme within MI5.
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Assessment & feedback
Summary accuracy