The chair of the Office for Budget Responsibility has resigned following the error which saw Rachel Reeves’s Budget published an hour before she stood up in Parliament to deliver it.

Richard Hughes said he took “full responsibility” for the “worst failure” in the institution’s history, which was down to a technical error, and said he was resigning to allow it to “quickly move on from this regrettable incident”.

The OBR conducted an internal inquiry into the leak and found it was down to “configuration errors” which led to “a failure to ensure the protections which hide documents from public view immediately before publication were in place”.