Britain's Chancellor of the Exchequer Rachel Reeves holds the red Budget box outside 11 Downing Street (Image: Wiktor Szymanowicz, Wiktor Szymanowicz/Future Publishing via Getty Images)

The inquiry into last week's extraordinary Budget leak will deliver its findings on Monday, the Chancellor has confirmed. Wednesday's Budget particulars were inadvertently made public nearly an hour ahead of schedule when official projections from the Office for Budget Responsibility (OBR) were mistakenly published on the watchdog's website.

The OBR issued an apology for the breach and promptly initiated an inquiry, enlisting specialist expertise from Professor Ciaran Martin, the former director of the National Cyber Security Centre (NCSC). Despite Professor Martin's participation, the OBR has stated th

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