Welcome to the Post Office Horizon IT Inquiry website

This is an independent public statutory Inquiry established to gather a clear account of the implementation and failings of the Horizon IT system at the Post Office over its lifetime.

Call for Evidence

Ahead of Phases 3 and 4 of the Inquiry, our Chair, Sir Wyn Williams, is calling for witnesses involved in training, assisting, auditing or investigating subpostmasters to come forward. Find more details here.

Public Hearings Timeline

Indicative timeline for phases of the Inquiry.

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Wellbeing and Support

Read about how you can receive support from the Inquiry if you are participating.

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Latest news from the Inquiry

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Lawyers representing subpostmasters and Post Office Ltd respond to Chair’s preliminary decision to refuse BEIS restriction order application

Responses from core participants published

Statement from the Chair ahead of Compensation Issues hearings

Sir Wyn Williams' statement ahead of hearings on 6 and 13 July

Inquiry publishes written submissions ahead of Issues of Compensation hearings

Read submissions the Inquiry has received