Question to the Cabinet Office:

To ask the Minister for the Cabinet Office, with reference to the Government Response to the Intelligence and Security Committee of Parliament Report 'IRAN', published in September 2025, CP 1403, what information the Government holds on whether hostile actors from Iran have infiltrated Parliament through parliamentary staffers.

HMG does not routinely comment on the details of operational matters or specific threats.

However, we take all threats to national security, including those from Iran, incredibly seriously. Whilst the security of Parliament is a matter for the Parliament, HMG will do whatever is needed to help keep our democratic institutions safe from foreign interference and espionage threats.

This includes protecting them from malign Iranian influence activity in the UK, including placing the whole of the Iranian State- including Iran’s intelligence services- on the enhanced tier of the Foreign Influence Registration Scheme. This means that those who are directed by Iran to conduct activities in the UK must register that activity, whatever it is, or face 5 years in prison.

On 13 October, MI5’s National Protective Security Authority published new guidance to better protect the UK’s democratic institutions from all foreign interference and espionage threats.The guidance is designed to help MPs, peers, councillors, Parliamentary staff and candidates understand the threat and take simple, effective steps to protect themselves, their teams, and the integrity of the UK’s democracy.